[svn-r16369] Description:

	Bring r16347:16367 from trunk into revise_chunks branch.

Tested on:
	FreeBSD/32 6.3 (duty)
	(h5committest not required on this branch)

41 files changed, 241 insertions, 161 deletions

diff --git a/tools/h5diff/h5diff_common.c b/tools/h5diff/h5diff_common.c
index 8a49fa0..3f2b8cf 100644
--- a/tools/h5diff/h5diff_common.c
+++ b/tools/h5diff/h5diff_common.c
@@ -31,7 +31,7 @@ const char  *progname = "h5diff";
  * Command-line options: The user can specify short or long-named
  * parameters.
  */
-static const char *s_opts = "hVrvqn:d:p:N";
+static const char *s_opts = "hVrvqn:d:p:Nc";
 static struct long_options l_opts[] = {
     { "help", no_arg, 'h' },
     { "version", no_arg, 'V' },
@@ -42,6 +42,7 @@ static struct long_options l_opts[] = {
     { "delta", require_arg, 'd' },
     { "relative", require_arg, 'p' },
     { "nan", no_arg, 'N' },
+    { "compare", no_arg, 'c' },
     { NULL, 0, '\0' }
 };
 
@@ -138,6 +139,9 @@ void parse_command_line(int argc,
         case 'N':
             options->do_nans = 0;
             break;
+        case 'c':
+            options->m_list_not_cmp = 1;
+            break;
         }
     }
 
@@ -194,11 +198,15 @@ void parse_command_line(int argc,
 
      if (options->not_cmp==1)
      {
-         printf("--------------------------------\n");
-         printf("Some objects are not comparable\n");
-         printf("--------------------------------\n");
-         if (!options->m_verbose)
-             printf("Use -v for a list of objects.\n");
+         if ( options->m_list_not_cmp == 0 )
+         {
+             printf("--------------------------------\n");
+             printf("Some objects are not comparable\n");
+             printf("--------------------------------\n");
+             printf("Use -c for a list of objects.\n");
+         }
+        
+             
      }
 
  }
@@ -331,6 +339,7 @@ void usage(void)
  printf("   -r, --report            Report mode. Print differences\n");
  printf("   -v, --verbose           Verbose mode. Print differences, list of objects\n");
  printf("   -q, --quiet             Quiet mode. Do not do output\n");
+ printf("   -c, --compare           List objects that are not comparable\n");
  printf("   -N, --nan               Avoid NaNs detection\n");
 
  printf("   -n C, --count=C         Print differences up to C number\n");
diff --git a/tools/h5diff/h5diffgentest.c b/tools/h5diff/h5diffgentest.c
index ca14501..ec379be 100644
--- a/tools/h5diff/h5diffgentest.c
+++ b/tools/h5diff/h5diffgentest.c
@@ -328,6 +328,25 @@ int test_basic(const char *fname1, const char *fname2, const char *fname3)
         write_dset(gid1,1,dims1,"fp18",H5T_NATIVE_DOUBLE,data18);
         
     }
+
+    /* not comparable objects */
+    {
+        double       data2[6] = {0,0,0,0,0,0};
+        int          data3[6] = {0,0,0,0,0,0};
+        int          data4[3][2] = {{0,0},{0,0},{0,0}};
+        hsize_t      dims3[2] = { 2,2 };
+        int          data5[2][2] = {{0,0},{0,0}};
+        unsigned int data6[3][2] = {{0,0},{0,0},{0,0}};
+
+        write_dset(gid3,1,dims1,"dset1",H5T_NATIVE_DOUBLE,NULL);
+        write_dset(gid3,1,dims1,"dset2",H5T_NATIVE_DOUBLE,data2);
+        write_dset(gid3,1,dims1,"dset3",H5T_NATIVE_INT,data3);
+        write_dset(gid3,2,dims2,"dset4",H5T_NATIVE_INT,data4);
+        write_dset(gid3,2,dims3,"dset5",H5T_NATIVE_INT,data5);
+        write_dset(gid3,2,dims2,"dset6",H5T_NATIVE_UINT,data6);
+        
+        
+    }
     
     
     /*-------------------------------------------------------------------------
diff --git a/tools/h5diff/testfiles/h5diff_10.txt b/tools/h5diff/testfiles/h5diff_10.txt
index 5480df1..316f06c 100644
--- a/tools/h5diff/testfiles/h5diff_10.txt
+++ b/tools/h5diff/testfiles/h5diff_10.txt
@@ -9,6 +9,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_16_1.txt b/tools/h5diff/testfiles/h5diff_16_1.txt
index 6155ebf..519f695 100644
--- a/tools/h5diff/testfiles/h5diff_16_1.txt
+++ b/tools/h5diff/testfiles/h5diff_16_1.txt
@@ -8,6 +8,3 @@ position        dset5           dset6           difference      relative
 [ 1 1 ]          0               100             100             not comparable
 [ 2 1 ]          100             50              50              0.500000      
 5 differences found
---------------------------------
-Some objects are not comparable
---------------------------------
diff --git a/tools/h5diff/testfiles/h5diff_16_2.txt b/tools/h5diff/testfiles/h5diff_16_2.txt
index 43127bb..233b133 100644
--- a/tools/h5diff/testfiles/h5diff_16_2.txt
+++ b/tools/h5diff/testfiles/h5diff_16_2.txt
@@ -8,6 +8,3 @@ position        dset7           dset8           difference      relative
 [ 1 1 ]          0               100             100             not comparable
 [ 2 1 ]          100             50              50              0.500000      
 5 differences found
---------------------------------
-Some objects are not comparable
---------------------------------
diff --git a/tools/h5diff/testfiles/h5diff_16_3.txt b/tools/h5diff/testfiles/h5diff_16_3.txt
index 6da24cf..b96c8a4 100644
--- a/tools/h5diff/testfiles/h5diff_16_3.txt
+++ b/tools/h5diff/testfiles/h5diff_16_3.txt
@@ -8,6 +8,3 @@ position        dset9           dset10          difference      relative
 [ 1 1 ]          0               100             100             not comparable
 [ 2 1 ]          100             50              50              0.5           
 5 differences found
---------------------------------
-Some objects are not comparable
---------------------------------
diff --git a/tools/h5diff/testfiles/h5diff_17.txt b/tools/h5diff/testfiles/h5diff_17.txt
index 40ea563..2ffbda9 100644
--- a/tools/h5diff/testfiles/h5diff_17.txt
+++ b/tools/h5diff/testfiles/h5diff_17.txt
@@ -23,6 +23,12 @@ file1     file2
     x           /g1/fp2        
     x           /g1/ld         
            x    /g2            
+           x    /g2/dset1      
+           x    /g2/dset2      
+           x    /g2/dset3      
+           x    /g2/dset4      
+           x    /g2/dset5      
+           x    /g2/dset6      
 
 group  : </> and </>
 0 differences found
diff --git a/tools/h5diff/testfiles/h5diff_20.txt b/tools/h5diff/testfiles/h5diff_20.txt
index e383972..b2fda7c 100644
--- a/tools/h5diff/testfiles/h5diff_20.txt
+++ b/tools/h5diff/testfiles/h5diff_20.txt
@@ -1,4 +1,5 @@
-Comparison not possible: </dset> is of type H5G_DATASET and </g1> is of type H5G_GROUP
+</dset> is of type H5G_DATASET and </g1> is of type H5G_GROUP
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_200.txt b/tools/h5diff/testfiles/h5diff_200.txt
new file mode 100644
index 0000000..56d723d
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_200.txt
@@ -0,0 +1,4 @@
+--------------------------------
+Some objects are not comparable
+--------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_201.txt b/tools/h5diff/testfiles/h5diff_201.txt
new file mode 100644
index 0000000..599cc2b
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_201.txt
@@ -0,0 +1 @@
+</g2/dset1> or </g2/dset2> are empty datasets
diff --git a/tools/h5diff/testfiles/h5diff_202.txt b/tools/h5diff/testfiles/h5diff_202.txt
new file mode 100644
index 0000000..a881cf5
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_202.txt
@@ -0,0 +1,2 @@
+</g2/dset2> is of class H5T_FLOAT and </g2/dset3> is of class H5T_INTEGER
+</g2/dset2> has sign H5T_SGN_ERROR and </g2/dset3> has sign H5T_SGN_2
diff --git a/tools/h5diff/testfiles/h5diff_203.txt b/tools/h5diff/testfiles/h5diff_203.txt
new file mode 100644
index 0000000..aea1891
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_203.txt
@@ -0,0 +1,2 @@
+</g2/dset3> has rank 1, dimensions [6], max dimensions [6]
+</g2/dset4> has rank 2, dimensions [3x2], max dimensions [3x2]
diff --git a/tools/h5diff/testfiles/h5diff_204.txt b/tools/h5diff/testfiles/h5diff_204.txt
new file mode 100644
index 0000000..66b9e63
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_204.txt
@@ -0,0 +1,2 @@
+</g2/dset4> has rank 2, dimensions [3x2], max dimensions [3x2]
+</g2/dset5> has rank 2, dimensions [2x2], max dimensions [2x2]
diff --git a/tools/h5diff/testfiles/h5diff_205.txt b/tools/h5diff/testfiles/h5diff_205.txt
new file mode 100644
index 0000000..f7360ab
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_205.txt
@@ -0,0 +1,3 @@
+</g2/dset5> has rank 2, dimensions [2x2], max dimensions [2x2]
+</g2/dset6> has rank 2, dimensions [3x2], max dimensions [3x2]
+</g2/dset5> has sign H5T_SGN_2 and </g2/dset6> has sign H5T_SGN_NONE
diff --git a/tools/h5diff/testfiles/h5diff_21.txt b/tools/h5diff/testfiles/h5diff_21.txt
index d5b0443..5518e0c 100644
--- a/tools/h5diff/testfiles/h5diff_21.txt
+++ b/tools/h5diff/testfiles/h5diff_21.txt
@@ -1,4 +1,5 @@
-Comparison not possible: </dset> is of type H5G_DATASET and </l1> is of type H5G_LINK
+</dset> is of type H5G_DATASET and </l1> is of type H5G_LINK
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_22.txt b/tools/h5diff/testfiles/h5diff_22.txt
index d8714a0..0f9493b 100644
--- a/tools/h5diff/testfiles/h5diff_22.txt
+++ b/tools/h5diff/testfiles/h5diff_22.txt
@@ -1,4 +1,5 @@
-Comparison not possible: </dset> is of type H5G_DATASET and </t1> is of type H5G_TYPE
+</dset> is of type H5G_DATASET and </t1> is of type H5G_TYPE
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_57.txt b/tools/h5diff/testfiles/h5diff_57.txt
index 590d355..c1a0d64 100644
--- a/tools/h5diff/testfiles/h5diff_57.txt
+++ b/tools/h5diff/testfiles/h5diff_57.txt
@@ -2,8 +2,9 @@ dataset: </dset7a> and </dset7b>
 Warning: different storage datatype
 </dset7a> has file datatype H5T_STD_I8LE
 </dset7b> has file datatype H5T_STD_U8LE
-Comparison not supported: </dset7a> has sign H5T_SGN_2 and </dset7b> has sign H5T_SGN_NONE
+</dset7a> has sign H5T_SGN_2 and </dset7b> has sign H5T_SGN_NONE
 0 differences found
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_600.txt b/tools/h5diff/testfiles/h5diff_600.txt
index 22a3155..f6492cd 100644
--- a/tools/h5diff/testfiles/h5diff_600.txt
+++ b/tools/h5diff/testfiles/h5diff_600.txt
@@ -9,6 +9,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_603.txt b/tools/h5diff/testfiles/h5diff_603.txt
index 80ee102..b3a2d91 100644
--- a/tools/h5diff/testfiles/h5diff_603.txt
+++ b/tools/h5diff/testfiles/h5diff_603.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_604.txt b/tools/h5diff/testfiles/h5diff_604.txt
index acb12b9..f76be67 100644
--- a/tools/h5diff/testfiles/h5diff_604.txt
+++ b/tools/h5diff/testfiles/h5diff_604.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_605.txt b/tools/h5diff/testfiles/h5diff_605.txt
index 94f016d..6a5d5cb 100644
--- a/tools/h5diff/testfiles/h5diff_605.txt
+++ b/tools/h5diff/testfiles/h5diff_605.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_606.txt b/tools/h5diff/testfiles/h5diff_606.txt
index f181030..8338959 100644
--- a/tools/h5diff/testfiles/h5diff_606.txt
+++ b/tools/h5diff/testfiles/h5diff_606.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_612.txt b/tools/h5diff/testfiles/h5diff_612.txt
index 840058d..ae42501 100644
--- a/tools/h5diff/testfiles/h5diff_612.txt
+++ b/tools/h5diff/testfiles/h5diff_612.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_613.txt b/tools/h5diff/testfiles/h5diff_613.txt
index 5c18686..a5fbeff 100644
--- a/tools/h5diff/testfiles/h5diff_613.txt
+++ b/tools/h5diff/testfiles/h5diff_613.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_614.txt b/tools/h5diff/testfiles/h5diff_614.txt
index a630e02..d5716f6 100644
--- a/tools/h5diff/testfiles/h5diff_614.txt
+++ b/tools/h5diff/testfiles/h5diff_614.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_615.txt b/tools/h5diff/testfiles/h5diff_615.txt
index 8fdc0ce..be344bb 100644
--- a/tools/h5diff/testfiles/h5diff_615.txt
+++ b/tools/h5diff/testfiles/h5diff_615.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_621.txt b/tools/h5diff/testfiles/h5diff_621.txt
index 746977e..082598e 100644
--- a/tools/h5diff/testfiles/h5diff_621.txt
+++ b/tools/h5diff/testfiles/h5diff_621.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_622.txt b/tools/h5diff/testfiles/h5diff_622.txt
index 4ead1fb..986b196 100644
--- a/tools/h5diff/testfiles/h5diff_622.txt
+++ b/tools/h5diff/testfiles/h5diff_622.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_623.txt b/tools/h5diff/testfiles/h5diff_623.txt
index fb94e0d..cba630e 100644
--- a/tools/h5diff/testfiles/h5diff_623.txt
+++ b/tools/h5diff/testfiles/h5diff_623.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_624.txt b/tools/h5diff/testfiles/h5diff_624.txt
index bb4b133..3a5554f 100644
--- a/tools/h5diff/testfiles/h5diff_624.txt
+++ b/tools/h5diff/testfiles/h5diff_624.txt
@@ -10,6 +10,7 @@ usage: h5diff [OPTIONS] file1 file2 [obj1[obj2]]
    -r, --report            Report mode. Print differences
    -v, --verbose           Verbose mode. Print differences, list of objects
    -q, --quiet             Quiet mode. Do not do output
+   -c, --compare           List objects that are not comparable
    -N, --nan               Avoid NaNs detection
    -n C, --count=C         Print differences up to C number
    -d D, --delta=D         Print difference when greater than limit D
diff --git a/tools/h5diff/testfiles/h5diff_70.txt b/tools/h5diff/testfiles/h5diff_70.txt
index 87f9beb..42fe6fc 100644
--- a/tools/h5diff/testfiles/h5diff_70.txt
+++ b/tools/h5diff/testfiles/h5diff_70.txt
@@ -2028,3 +2028,4 @@ position        float3D of </g1> float3D of </g1> difference
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_80.txt b/tools/h5diff/testfiles/h5diff_80.txt
index 9e7af5d..dcabf10 100644
--- a/tools/h5diff/testfiles/h5diff_80.txt
+++ b/tools/h5diff/testfiles/h5diff_80.txt
@@ -873,3 +873,4 @@ point #4              (2,8)              (1,7)
 --------------------------------
 Some objects are not comparable
 --------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_90.txt b/tools/h5diff/testfiles/h5diff_90.txt
index 7007d88..cfef527 100644
--- a/tools/h5diff/testfiles/h5diff_90.txt
+++ b/tools/h5diff/testfiles/h5diff_90.txt
@@ -7,6 +7,12 @@ file1     file2
     x      x    /g1/dset2      
     x      x    /g1/dset4      
     x      x    /g2            
+    x      x    /g2/dset1      
+    x      x    /g2/dset2      
+    x      x    /g2/dset3      
+    x      x    /g2/dset4      
+    x      x    /g2/dset5      
+    x      x    /g2/dset6      
 
 group  : </> and </>
 0 differences found
@@ -20,3 +26,20 @@ dataset: </g1/dset4> and </g1/dset4>
 0 differences found
 group  : </g2> and </g2>
 0 differences found
+dataset: </g2/dset1> and </g2/dset1>
+</g2/dset1> or </g2/dset1> are empty datasets
+0 differences found
+dataset: </g2/dset2> and </g2/dset2>
+0 differences found
+dataset: </g2/dset3> and </g2/dset3>
+0 differences found
+dataset: </g2/dset4> and </g2/dset4>
+0 differences found
+dataset: </g2/dset5> and </g2/dset5>
+0 differences found
+dataset: </g2/dset6> and </g2/dset6>
+0 differences found
+--------------------------------
+Some objects are not comparable
+--------------------------------
+Use -c for a list of objects.
diff --git a/tools/h5diff/testfiles/h5diff_basic2.h5 b/tools/h5diff/testfiles/h5diff_basic2.h5
index ad45cc0..edb0c65 100644
--- a/tools/h5diff/testfiles/h5diff_basic2.h5
+++ b/tools/h5diff/testfiles/h5diff_basic2.h5
diff --git a/tools/h5diff/testh5diff.sh b/tools/h5diff/testh5diff.sh
index 811b9d8..e37a047 100755
--- a/tools/h5diff/testh5diff.sh
+++ b/tools/h5diff/testh5diff.sh
@@ -578,6 +578,25 @@ TESTING $H5DIFF -v  $SRCFILE1 $SRCFILE1  g1/fp1 g1/fp2
 TOOLTEST h5diff_102.txt -v $FILE1 $FILE1 g1/fp1 g1/fp2 
 
 
+# not comparable -c flag
+TESTING $H5DIFF $SRCFILE2 $SRCFILE2 g2/dset1  g2/dset2
+TOOLTEST h5diff_200.txt $FILE2 $FILE2 g2/dset1  g2/dset2 
+
+TESTING $H5DIFF -c $SRCFILE2 $SRCFILE2 g2/dset1  g2/dset2
+TOOLTEST h5diff_201.txt -c $FILE2 $FILE2 g2/dset1  g2/dset2 
+
+TESTING $H5DIFF -c $SRCFILE2 $SRCFILE2 g2/dset2  g2/dset3
+TOOLTEST h5diff_202.txt -c $FILE2 $FILE2 g2/dset2  g2/dset3
+
+TESTING $H5DIFF -c $SRCFILE2 $SRCFILE2 g2/dset3  g2/dset4
+TOOLTEST h5diff_203.txt -c $FILE2 $FILE2 g2/dset3  g2/dset4
+
+TESTING $H5DIFF -c $SRCFILE2 $SRCFILE2 g2/dset4  g2/dset5
+TOOLTEST h5diff_204.txt -c $FILE2 $FILE2 g2/dset4  g2/dset5
+
+TESTING $H5DIFF -c $SRCFILE2 $SRCFILE2 g2/dset5  g2/dset6
+TOOLTEST h5diff_205.txt -c $FILE2 $FILE2 g2/dset5  g2/dset6
+
 
 # ##############################################################################
 # # END
diff --git a/tools/lib/h5diff.c b/tools/lib/h5diff.c
index a7d9a05..38c5f54 100644
--- a/tools/lib/h5diff.c
+++ b/tools/lib/h5diff.c
@@ -846,10 +846,12 @@ hsize_t diff_compare(hid_t file1_id,
     /* objects are not the same type */
     if (info1->paths[i].type != info2->paths[j].type)
     {
-        if (options->m_verbose)
-            parallel_print("Comparison not possible: <%s> is of type %s and <%s> is of type %s\n",
+        if (options->m_verbose||options->m_list_not_cmp)
+        {
+            parallel_print("<%s> is of type %s and <%s> is of type %s\n",
             obj1_name, get_type(info1->paths[i].type), obj2_name,
             get_type(info2->paths[j].type));
+        }
         options->not_cmp=1;
         return 0;
     }
diff --git a/tools/lib/h5diff.h b/tools/lib/h5diff.h
index 57d06a5..9028ce5 100644
--- a/tools/lib/h5diff.h
+++ b/tools/lib/h5diff.h
@@ -35,10 +35,11 @@ typedef struct {
     int    n;         /* count, compare up to count */
     hsize_t count;    /* count value */
     int    err_stat;  /* an error ocurred (1, error, 0, no error) */
-    int    cmn_objs;  /* do we have comparable objects */
+    int    cmn_objs;  /* do we have common objects */
     int    not_cmp;   /* are the objects comparable */
     int    contents;  /* equal contents */
     int    do_nans;   /* consider Nans while diffing floats */
+    int    m_list_not_cmp;   /* list not comparable messages */
 } diff_opt_t;
 
 
diff --git a/tools/lib/h5diff_array.c b/tools/lib/h5diff_array.c
index 5481d23..8d733b3 100644
--- a/tools/lib/h5diff_array.c
+++ b/tools/lib/h5diff_array.c
@@ -831,7 +831,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_char,temp2_char,ABS(temp1_char-temp2_char));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -861,7 +860,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_char,temp2_char,ABS(temp1_char-temp2_char));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -930,7 +928,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_uchar,temp2_uchar,PDIFF(temp1_uchar,temp2_uchar));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -960,7 +957,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_uchar,temp2_uchar,PDIFF(temp1_uchar,temp2_uchar));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1031,7 +1027,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_short,temp2_short,ABS(temp1_short-temp2_short));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1061,7 +1056,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_short,temp2_short,ABS(temp1_short-temp2_short));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1134,7 +1128,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_ushort,temp2_ushort,
                             PDIFF(temp1_ushort,temp2_ushort));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1164,7 +1157,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_ushort,temp2_ushort,PDIFF(temp1_ushort,temp2_ushort));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1234,7 +1226,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_int,temp2_int,ABS(temp1_int-temp2_int));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1264,7 +1255,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_int,temp2_int,ABS(temp1_int-temp2_int));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1334,7 +1324,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_uint,temp2_uint,PDIFF(temp1_uint,temp2_uint));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1364,7 +1353,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(I_FORMAT_P_NOTCOMP,temp1_uint,temp2_uint,PDIFF(temp1_uint,temp2_uint));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1435,7 +1423,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(LI_FORMAT_P_NOTCOMP,temp1_long,temp2_long,
                             ABS(temp1_long-temp2_long));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1465,7 +1452,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(LI_FORMAT_P_NOTCOMP,temp1_long,temp2_long,ABS(temp1_long-temp2_long));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1536,7 +1522,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(ULI_FORMAT_P_NOTCOMP,temp1_ulong,temp2_ulong,PDIFF(temp1_ulong,temp2_ulong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1566,7 +1551,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(ULI_FORMAT_P_NOTCOMP,temp1_ulong,temp2_ulong,PDIFF(temp1_ulong,temp2_ulong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1637,7 +1621,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(LLI_FORMAT_P_NOTCOMP,temp1_llong,temp2_llong,ABS(temp1_llong-temp2_llong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1667,7 +1650,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(LLI_FORMAT_P_NOTCOMP,temp1_llong,temp2_llong,ABS(temp1_llong-temp2_llong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1739,7 +1721,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(ULLI_FORMAT_P_NOTCOMP,temp1_ullong,temp2_ullong,PDIFF(temp1_ullong,temp2_ullong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1772,7 +1753,6 @@ hsize_t diff_datum(void       *_mem1,
                         parallel_print(SPACES);
                         parallel_print(ULLI_FORMAT_P_NOTCOMP,temp1_ullong,temp2_ullong,PDIFF(temp1_ullong,temp2_ullong));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -1899,7 +1879,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(SPACES);
                             parallel_print(F_FORMAT_P_NOTCOMP,temp1_float,temp2_float,ABS(temp1_float-temp2_float));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -1953,7 +1932,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(F_FORMAT_P_NOTCOMP,temp1_float,temp2_float,
                                 ABS(temp1_float-temp2_float));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -2077,7 +2055,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(F_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                                 ABS(temp1_double-temp2_double));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -2130,7 +2107,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(F_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                                 ABS(temp1_double-temp2_double));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -2257,7 +2233,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(LD_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                                 ABS(temp1_double-temp2_double));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -2310,7 +2285,6 @@ hsize_t diff_datum(void       *_mem1,
                             parallel_print(LD_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                                 ABS(temp1_double-temp2_double));
                         }
-                        options->not_cmp=1;
                         nfound++;
                     }
 
@@ -2863,7 +2837,6 @@ hsize_t diff_float(unsigned char *mem1,
                         parallel_print(F_FORMAT_P_NOTCOMP,temp1_float,temp2_float,
                             ABS(temp1_float-temp2_float));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -2925,7 +2898,6 @@ hsize_t diff_float(unsigned char *mem1,
                         parallel_print(F_FORMAT_P_NOTCOMP,temp1_float,temp2_float,
                             ABS(temp1_float-temp2_float));
                     }
-                    options->not_cmp=1;
                     nfound++;
                 }
 
@@ -3073,7 +3045,6 @@ hsize_t diff_double(unsigned char *mem1,
                     parallel_print(F_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                         ABS(temp1_double-temp2_double));
                 }
-                options->not_cmp=1;
                 nfound++;
             }
 
@@ -3118,7 +3089,6 @@ hsize_t diff_double(unsigned char *mem1,
                     parallel_print(F_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                         ABS(temp1_double-temp2_double));
                 }
-                options->not_cmp=1;
                 nfound++;
             }
 
@@ -3252,7 +3222,6 @@ hsize_t diff_ldouble(unsigned char *mem1,
                     parallel_print(LD_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                         ABS(temp1_double-temp2_double));
                 }
-                options->not_cmp=1;
                 nfound++;
             }
 
@@ -3297,7 +3266,6 @@ hsize_t diff_ldouble(unsigned char *mem1,
                     parallel_print(LD_FORMAT_P_NOTCOMP,temp1_double,temp2_double,
                         ABS(temp1_double-temp2_double));
                 }
-                options->not_cmp=1;
                 nfound++;
             }
 
@@ -3430,7 +3398,6 @@ hsize_t diff_schar(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_char,temp2_char,
                      ABS(temp1_char-temp2_char));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3475,7 +3442,6 @@ hsize_t diff_schar(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_char,temp2_char,
                      ABS(temp1_char-temp2_char));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3610,7 +3576,6 @@ hsize_t diff_uchar(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_uchar,temp2_uchar,
                      PDIFF(temp1_uchar,temp2_uchar));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3655,7 +3620,6 @@ hsize_t diff_uchar(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_uchar,temp2_uchar,
                      PDIFF(temp1_uchar,temp2_uchar));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3787,7 +3751,6 @@ hsize_t diff_short(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_short,temp2_short,
                      ABS(temp1_short-temp2_short));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3834,7 +3797,6 @@ hsize_t diff_short(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_short,temp2_short,
                      ABS(temp1_short-temp2_short));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -3967,7 +3929,6 @@ hsize_t diff_ushort(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_ushort,temp2_ushort,
                      PDIFF(temp1_ushort,temp2_ushort));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4014,7 +3975,6 @@ hsize_t diff_ushort(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_ushort,temp2_ushort,
                      PDIFF(temp1_ushort,temp2_ushort));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4148,7 +4108,6 @@ hsize_t diff_int(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_int,temp2_int,
                      ABS(temp1_int-temp2_int));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4195,7 +4154,6 @@ hsize_t diff_int(unsigned char *mem1,
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_int,temp2_int,
                      ABS(temp1_int-temp2_int));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4328,7 +4286,6 @@ hsize_t diff_uint(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_uint,temp2_uint,PDIFF(temp1_uint,temp2_uint));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4374,7 +4331,6 @@ hsize_t diff_uint(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(I_FORMAT_P_NOTCOMP,temp1_uint,temp2_uint,PDIFF(temp1_uint,temp2_uint));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4511,7 +4467,6 @@ hsize_t diff_long(unsigned char *mem1,
                  parallel_print(LI_FORMAT_P_NOTCOMP,temp1_long,temp2_long,
                      ABS(temp1_long-temp2_long));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4558,7 +4513,6 @@ hsize_t diff_long(unsigned char *mem1,
                  parallel_print(LI_FORMAT_P_NOTCOMP,temp1_long,temp2_long,
                      ABS(temp1_long-temp2_long));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4698,7 +4652,6 @@ hsize_t diff_ulong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(ULI_FORMAT_P_NOTCOMP,temp1_ulong,temp2_ulong,PDIFF(temp1_ulong,temp2_ulong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4744,7 +4697,6 @@ hsize_t diff_ulong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(ULI_FORMAT_P_NOTCOMP,temp1_ulong,temp2_ulong,PDIFF(temp1_ulong,temp2_ulong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4877,7 +4829,6 @@ hsize_t diff_llong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(LLI_FORMAT_P_NOTCOMP,temp1_llong,temp2_llong,ABS(temp1_llong-temp2_llong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -4921,7 +4872,6 @@ hsize_t diff_llong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(LLI_FORMAT_P_NOTCOMP,temp1_llong,temp2_llong,ABS(temp1_llong-temp2_llong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -5055,7 +5005,6 @@ hsize_t diff_ullong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(ULLI_FORMAT_P_NOTCOMP,temp1_ullong,temp2_ullong,PDIFF(temp1_ullong,temp2_ullong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -5101,7 +5050,6 @@ hsize_t diff_ullong(unsigned char *mem1,
                  parallel_print(SPACES);
                  parallel_print(ULLI_FORMAT_P_NOTCOMP,temp1_ullong,temp2_ullong,PDIFF(temp1_ullong,temp2_ullong));
              }
-             options->not_cmp=1;
              nfound++;
          }
 
@@ -5449,6 +5397,8 @@ my_isnan(dtype_t type, void *val)
         double x;
         HDmemcpy(&x, val, sizeof(double));
         retval = (x!=x);
+        //printf("x=%g retval =%d\n", x,retval);
+
 #if H5_SIZEOF_LONG_DOUBLE!=H5_SIZEOF_DOUBLE && H5_SIZEOF_LONG_DOUBLE!=0
     }
     else if (FLT_LDOUBLE==type)
diff --git a/tools/lib/h5diff_attr.c b/tools/lib/h5diff_attr.c
index 6dec22b..747b12c 100644
--- a/tools/lib/h5diff_attr.c
+++ b/tools/lib/h5diff_attr.c
@@ -150,11 +150,6 @@ hsize_t diff_attr(hid_t loc1_id,
             options)!=1)
         {
 
-            if (options->m_verbose)
-                printf("Comparison not possible for attribute <%s>\n",
-                name1);
-
-            options->not_cmp=1;
 
             if (H5Tclose(ftype1_id)<0)
                 goto error;
diff --git a/tools/lib/h5diff_dset.c b/tools/lib/h5diff_dset.c
index 212f089..1a5778a 100644
--- a/tools/lib/h5diff_dset.c
+++ b/tools/lib/h5diff_dset.c
@@ -44,7 +44,7 @@ hsize_t diff_dataset( hid_t file1_id,
     hid_t   dcpl1 = -1;
     hid_t   dcpl2 = -1;
     hsize_t nfound = 0;
-    
+   
     /*-------------------------------------------------------------------------
     * open the handles
     *-------------------------------------------------------------------------
@@ -102,7 +102,8 @@ hsize_t diff_dataset( hid_t file1_id,
         H5Dclose(did2);
         /* enable error reporting */
     } H5E_END_TRY;
-    
+
+   
     return nfound;
     
 error:
@@ -206,7 +207,7 @@ hsize_t diff_datasetid( hid_t did1,
     hsize_t    storage_size1;
     hsize_t    storage_size2;
     hsize_t    nfound=0;               /* number of differences found */
-    int        cmp=1;                  /* do diff or not */
+    int        can_compare=1;          /* do diff or not */
     void       *buf1=NULL;
     void       *buf2=NULL;
     void       *sm_buf1=NULL;
@@ -265,9 +266,9 @@ hsize_t diff_datasetid( hid_t did1,
     
     if (storage_size1==0 || storage_size2==0)
     {
-        if (options->m_verbose && obj1_name && obj2_name)
+        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
             parallel_print("<%s> or <%s> are empty datasets\n", obj1_name, obj2_name);
-        cmp=0;
+        can_compare=0;
         options->not_cmp=1;
     }
     
@@ -288,8 +289,7 @@ hsize_t diff_datasetid( hid_t did1,
         obj2_name,
         options)!=1)
     {
-        cmp=0;
-        options->not_cmp=1;
+        can_compare=0;
     }
     
     /*-------------------------------------------------------------------------
@@ -314,12 +314,13 @@ hsize_t diff_datasetid( hid_t did1,
     sign2=H5Tget_sign(m_tid2);
     if ( sign1 != sign2 )
     {
-        if (options->m_verbose && obj1_name) {
-            parallel_print("Comparison not supported: <%s> has sign %s ", obj1_name, get_sign(sign1));
+        if ((options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name) 
+        {
+            parallel_print("<%s> has sign %s ", obj1_name, get_sign(sign1));
             parallel_print("and <%s> has sign %s\n", obj2_name, get_sign(sign2));
         }
         
-        cmp=0;
+        can_compare=0;
         options->not_cmp=1;
     }
     
@@ -327,7 +328,7 @@ hsize_t diff_datasetid( hid_t did1,
     * only attempt to compare if possible
     *-------------------------------------------------------------------------
     */
-    if (cmp)
+    if (can_compare ) /* it is possible to compare */
     {
         
         /*-------------------------------------------------------------------------
@@ -543,7 +544,7 @@ hsize_t diff_datasetid( hid_t did1,
             }
             
  } /* hyperslab read */
- }/*cmp*/
+ }/*can_compare*/
  
   /*-------------------------------------------------------------------------
   * compare attributes
@@ -669,6 +670,7 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     int          maxdim_diff=0;          /* maximum dimensions are different */
     int          dim_diff=0;             /* current dimensions are different */
     int          i;
+    int          can_compare = 1;        /* return value */
     
     /*-------------------------------------------------------------------------
     * check for the same class
@@ -683,13 +685,15 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     
     if ( tclass1 != tclass2 )
     {
-        if (options->m_verbose && obj1_name) 
+        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
         {
-            printf("Comparison not possible: <%s> is of class %s and <%s> is of class %s\n",
+            parallel_print("<%s> is of class %s and <%s> is of class %s\n",
                 obj1_name, get_class(tclass1),
                 obj2_name, get_class(tclass2) );
         }
-        return 0;
+        can_compare = 0;
+        options->not_cmp = 1;
+        return can_compare;
     }
     
     /*-------------------------------------------------------------------------
@@ -714,10 +718,16 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
         break;
         
     default: /*H5T_TIME */
-        if (options->m_verbose && obj1_name )
-            printf("Comparison not supported: <%s> and <%s> are of class %s\n",
-            obj1_name,obj2_name,get_class(tclass2) );
-        return 0;
+        
+
+        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
+        {
+            parallel_print("<%s> and <%s> are of class %s\n",
+                obj1_name,obj2_name,get_class(tclass2) );
+        }
+        can_compare = 0;
+        options->not_cmp = 1;
+        return can_compare;
     }
     
     /*-------------------------------------------------------------------------
@@ -725,21 +735,26 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     *-------------------------------------------------------------------------
     */
     
-    if ( (H5Tequal(f_tid1, f_tid2)==0) && options->m_verbose && obj1_name)
+    if ( (H5Tequal(f_tid1, f_tid2)==0) &&
+        (options->m_verbose) && obj1_name && obj2_name)
     {
         
         H5T_class_t cl = H5Tget_class(f_tid1);
-   
-        printf("Warning: different storage datatype\n");
+         
+
+        parallel_print("Warning: different storage datatype\n");
         if ( cl == H5T_INTEGER || cl == H5T_FLOAT )
         {
-            printf("<%s> has file datatype ", obj1_name);
+            parallel_print("<%s> has file datatype ", obj1_name);
             print_type(f_tid1);
-            printf("\n");
-            printf("<%s> has file datatype ", obj2_name);
+            parallel_print("\n");
+            parallel_print("<%s> has file datatype ", obj2_name);
             print_type(f_tid2);
-            printf("\n");
+            parallel_print("\n");
         }
+
+
+        
     }
     
     /*-------------------------------------------------------------------------
@@ -749,18 +764,24 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     
     if ( rank1 != rank2 )
     {
-        if (options->m_verbose && obj1_name) {
-            printf("Comparison not supported: <%s> has rank %d, dimensions ", obj1_name, rank1);
+
+        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
+        {
+            parallel_print("<%s> has rank %d, dimensions ", obj1_name, rank1);
             print_dimensions(rank1,dims1);
-            printf(", max dimensions ");
+            parallel_print(", max dimensions ");
             print_dimensions(rank1,maxdim1);
-            printf("\n" );
-            printf("<%s> has rank %d, dimensions ", obj2_name, rank2);
+            parallel_print("\n" );
+            parallel_print("<%s> has rank %d, dimensions ", obj2_name, rank2);
             print_dimensions(rank2,dims2);
-            printf(", max dimensions ");
+            parallel_print(", max dimensions ");
             print_dimensions(rank2,maxdim2);
+            parallel_print("\n");
         }
-        return 0;
+
+        can_compare = 0;
+        options->not_cmp = 1;
+        return can_compare;
     }
     
     /*-------------------------------------------------------------------------
@@ -787,20 +808,30 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     
     if (dim_diff==1)
     {
-        if (options->m_verbose && obj1_name) {
-            printf("Comparison not supported: <%s> has rank %d, dimensions ", obj1_name, rank1);
+        if ( (options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
+        {
+            parallel_print("<%s> has rank %d, dimensions ", obj1_name, rank1);
             print_dimensions(rank1,dims1);
-            if (maxdim1 && maxdim2) {
-                printf(", max dimensions ");
+            if (maxdim1 && maxdim2) 
+            {
+                parallel_print(", max dimensions ");
                 print_dimensions(rank1,maxdim1);
-                printf("\n" );
-                printf("<%s> has rank %d, dimensions ", obj2_name, rank2);
+                parallel_print("\n" );
+                parallel_print("<%s> has rank %d, dimensions ", obj2_name, rank2);
                 print_dimensions(rank2,dims2);
-                printf(", max dimensions ");
+                parallel_print(", max dimensions ");
                 print_dimensions(rank2,maxdim2);
+                parallel_print("\n");
             }
         }
-        return 0;
+        
+
+        can_compare = 0;
+        options->not_cmp = 1;
+        return can_compare;
+
+
+
     }
     
     /*-------------------------------------------------------------------------
@@ -810,17 +841,17 @@ int diff_can_type( hid_t       f_tid1, /* file data type */
     if (maxdim1 && maxdim2 && maxdim_diff==1 && obj1_name )
     {
         if (options->m_verbose) {
-            printf( "Warning: different maximum dimensions\n");
-            printf("<%s> has max dimensions ", obj1_name);
+            parallel_print( "Warning: different maximum dimensions\n");
+            parallel_print("<%s> has max dimensions ", obj1_name);
             print_dimensions(rank1,maxdim1);
-            printf("\n");
-            printf("<%s> has max dimensions ", obj2_name);
+            parallel_print("\n");
+            parallel_print("<%s> has max dimensions ", obj2_name);
             print_dimensions(rank2,maxdim2);
-            printf("\n");
+            parallel_print("\n");
         }
     }
     
-    return 1;
+    return can_compare;
 }
 
 
diff --git a/tools/lib/h5diff_util.c b/tools/lib/h5diff_util.c
index b8b9f30..35f4dfb 100644
--- a/tools/lib/h5diff_util.c
+++ b/tools/lib/h5diff_util.c
@@ -148,81 +148,81 @@ void print_type(hid_t type)
         return;
     case H5T_INTEGER:
         if (H5Tequal(type, H5T_STD_I8BE)) {
-            printf("H5T_STD_I8BE");
+            parallel_print("H5T_STD_I8BE");
         } else if (H5Tequal(type, H5T_STD_I8LE)) {
-            printf("H5T_STD_I8LE");
+            parallel_print("H5T_STD_I8LE");
         } else if (H5Tequal(type, H5T_STD_I16BE)) {
-            printf("H5T_STD_I16BE");
+            parallel_print("H5T_STD_I16BE");
         } else if (H5Tequal(type, H5T_STD_I16LE)) {
-            printf("H5T_STD_I16LE");
+            parallel_print("H5T_STD_I16LE");
         } else if (H5Tequal(type, H5T_STD_I32BE)) {
-            printf("H5T_STD_I32BE");
+            parallel_print("H5T_STD_I32BE");
         } else if (H5Tequal(type, H5T_STD_I32LE)) {
-            printf("H5T_STD_I32LE");
+            parallel_print("H5T_STD_I32LE");
         } else if (H5Tequal(type, H5T_STD_I64BE)) {
-            printf("H5T_STD_I64BE");
+            parallel_print("H5T_STD_I64BE");
         } else if (H5Tequal(type, H5T_STD_I64LE)) {
-            printf("H5T_STD_I64LE");
+            parallel_print("H5T_STD_I64LE");
         } else if (H5Tequal(type, H5T_STD_U8BE)) {
-            printf("H5T_STD_U8BE");
+            parallel_print("H5T_STD_U8BE");
         } else if (H5Tequal(type, H5T_STD_U8LE)) {
-            printf("H5T_STD_U8LE");
+            parallel_print("H5T_STD_U8LE");
         } else if (H5Tequal(type, H5T_STD_U16BE)) {
-            printf("H5T_STD_U16BE");
+            parallel_print("H5T_STD_U16BE");
         } else if (H5Tequal(type, H5T_STD_U16LE)) {
-            printf("H5T_STD_U16LE");
+            parallel_print("H5T_STD_U16LE");
         } else if (H5Tequal(type, H5T_STD_U32BE)) {
-            printf("H5T_STD_U32BE");
+            parallel_print("H5T_STD_U32BE");
         } else if (H5Tequal(type, H5T_STD_U32LE)) {
-            printf("H5T_STD_U32LE");
+            parallel_print("H5T_STD_U32LE");
         } else if (H5Tequal(type, H5T_STD_U64BE)) {
-            printf("H5T_STD_U64BE");
+            parallel_print("H5T_STD_U64BE");
         } else if (H5Tequal(type, H5T_STD_U64LE)) {
-            printf("H5T_STD_U64LE");
+            parallel_print("H5T_STD_U64LE");
         } else if (H5Tequal(type, H5T_NATIVE_SCHAR)) {
-            printf("H5T_NATIVE_SCHAR");
+            parallel_print("H5T_NATIVE_SCHAR");
         } else if (H5Tequal(type, H5T_NATIVE_UCHAR)) {
-            printf("H5T_NATIVE_UCHAR");
+            parallel_print("H5T_NATIVE_UCHAR");
         } else if (H5Tequal(type, H5T_NATIVE_SHORT)) {
-            printf("H5T_NATIVE_SHORT");
+            parallel_print("H5T_NATIVE_SHORT");
         } else if (H5Tequal(type, H5T_NATIVE_USHORT)) {
-            printf("H5T_NATIVE_USHORT");
+            parallel_print("H5T_NATIVE_USHORT");
         } else if (H5Tequal(type, H5T_NATIVE_INT)) {
-            printf("H5T_NATIVE_INT");
+            parallel_print("H5T_NATIVE_INT");
         } else if (H5Tequal(type, H5T_NATIVE_UINT)) {
-            printf("H5T_NATIVE_UINT");
+            parallel_print("H5T_NATIVE_UINT");
         } else if (H5Tequal(type, H5T_NATIVE_LONG)) {
-            printf("H5T_NATIVE_LONG");
+            parallel_print("H5T_NATIVE_LONG");
         } else if (H5Tequal(type, H5T_NATIVE_ULONG)) {
-            printf("H5T_NATIVE_ULONG");
+            parallel_print("H5T_NATIVE_ULONG");
         } else if (H5Tequal(type, H5T_NATIVE_LLONG)) {
-            printf("H5T_NATIVE_LLONG");
+            parallel_print("H5T_NATIVE_LLONG");
         } else if (H5Tequal(type, H5T_NATIVE_ULLONG)) {
-            printf("H5T_NATIVE_ULLONG");
+            parallel_print("H5T_NATIVE_ULLONG");
         } else {
-            printf("undefined integer");
+            parallel_print("undefined integer");
         }
         break;
 
     case H5T_FLOAT:
         if (H5Tequal(type, H5T_IEEE_F32BE)) {
-            printf("H5T_IEEE_F32BE");
+            parallel_print("H5T_IEEE_F32BE");
         } else if (H5Tequal(type, H5T_IEEE_F32LE)) {
-            printf("H5T_IEEE_F32LE");
+            parallel_print("H5T_IEEE_F32LE");
         } else if (H5Tequal(type, H5T_IEEE_F64BE)) {
-            printf("H5T_IEEE_F64BE");
+            parallel_print("H5T_IEEE_F64BE");
         } else if (H5Tequal(type, H5T_IEEE_F64LE)) {
-            printf("H5T_IEEE_F64LE");
+            parallel_print("H5T_IEEE_F64LE");
         } else if (H5Tequal(type, H5T_NATIVE_FLOAT)) {
-            printf("H5T_NATIVE_FLOAT");
+            parallel_print("H5T_NATIVE_FLOAT");
         } else if (H5Tequal(type, H5T_NATIVE_DOUBLE)) {
-            printf("H5T_NATIVE_DOUBLE");
+            parallel_print("H5T_NATIVE_DOUBLE");
 #if H5_SIZEOF_LONG_DOUBLE !=0
         } else if (H5Tequal(type, H5T_NATIVE_LDOUBLE)) {
-            printf("H5T_NATIVE_LDOUBLE");
+            parallel_print("H5T_NATIVE_LDOUBLE");
 #endif
         } else {
-            printf("undefined float");
+            parallel_print("undefined float");
         }
         break;