Add note for SDK 6.0-7.1 usage.

1 files changed, 7 insertions, 2 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index c6d32d6..2d04482 100755
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -39,8 +39,13 @@ RELEASE  VERSION/DATE TO BE FILLED IN LATER
     - Propagate the OS and windir environment variables from the system environment to the msvc
       environment.  The OS and windir environment variables are used in the MSVC 6.0 batch file
       and the SDK 6.0-7.1 SetEnv.cmd batch files.  Inclusion of the OS and windir environment
-      variables eliminates partial paths and warnings generated by the MSVC 6.0 and SDK 6.0-7.1
-      batch files when the variables are not defined.
+      variables eliminates some partial paths and warnings generated by the MSVC 6.0 and SDK
+      6.0-7.1 batch files when the variables are not defined.
+      Note: Attempting to run the SDK 6.0-7.1 batch files directly via MSVC_USE_SCRIPT can lead to
+            build failures and/or incomplete build environments.  The SDK 6.0-7.1 batch files
+            require delayed expansion to be enabled which is currently supported and is typically
+            not enabled by default on the host system. The batch files may also require environment
+            variables that are not included by default in the msvc environment.
 
   From William Deegan:
     - Fix check for unsupported Python version. It was broken. Also now the error message