The HDF5 1.8.20 release is now available. It can be obtained from The HDF Group Support Download page:
It can also be obtained directly from: https://support.hdfgroup.org/HDF5/release/obtain518.html
HDF5 1.8.20 is a minor release with a few new features and changes. Important changes
An issue with H5Zfilter_avail was fixed where it was not finding available plugins.
Improvements were made to the h5repack, h5ls, h5dump, h5diff, and h5import utilities.In particular, please be aware that the behavior of the h5repack utility changed. A parameter was added to the "UD=" option of h5repack to allow the user defined filter flag to be changed to either H5Z_FLAG_MANDATORY (0) or H5Z_FLAG_OPTIONAL (1).An example of the command with the new parameter is shown here:
h5repack -f UD=307,0,1,9 h5repack_layout.h5 out.h5repack_layout.h5