Cannot access datasets from files created with dclab>=0.43.0

[paulmueller]

If you encounter this issue, then there is a solution to it.

1. If you are working with dclab, Shape-Out 2, DCKit, or DCOR-Aid, you just need to install the latest version.
2. If you are working with other software, like HDFView, you need to make the Zstandard compression algorithm available as an HDF5 plugin. If you have admin rights on your computer, you can do this by putting the corresponding library file into a pre-defined directory (which you might have to create):
   2.1. Windows: Extract libh5zstd-windows.zip and put the libh5zstd.dll file in the directory C:\\ProgramData\hdf5\lib\plugin
   2.2. Linux: Extract libh5zstd-linux.zip and put the libh5zstd.so file in the directory /usr/local/hdf5/lib/plugin/.
   2.3. macOS: Extract libh5zstd-macos.zip and put the libh5zstd.dylib file in the directory /usr/local/hdf5/lib/plugin/.

Further reading:

• These libraries I downloaded from the 3.2.1 release of hdf5plugin https://pypi.org/project/hdf5plugin/
• https://portal.hdfgroup.org/display/HDF5/HDF5+Dynamically+Loaded+Filters

@ZELLMECHANIK-DRESDEN/collaborators

[PinkShnack]

FYI seems the above guide works for HDFView but not HDFViewApp. So make sure to download HDFView!

[paulmueller]

If you have problems with HDFView, make sure you did NOT download HDFViewApp from https://www.hdfgroup.org/downloads/hdfview/ (because accessing the Zstd library did not work on at least one occasion with Windows).