Objects to modify layout are...
Objects to apply filter are...
 User Defined 250
Making file <out-plugin_zero.h5repack_layout.h5>...
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 Type     Filter (Compression)     Name
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 group                       /
h5repack error: <h5repack_layout.h5>: Could not copy data to: out-plugin_zero.h5repack_layout.h5