Hi, I ran into the same issue on Ubuntu. After searching the hdfgroup websites for a while I found a link to the beta release of the upcoming version 3.0 of hdfview. This version is designed to work with the new 64bit-object libraries.
Announcement of the beta release: https://support.hdfgroup.org/products/java/release/hdfview3.html https://support.hdfgroup.org/newsletters/newsletter154.pdf The beta is s a source-only release. The correct link to the source is: https://support.hdfgroup.org/ftp/HDF5/releases/HDF-JAVA/hdfview-3.0.0/src/hdfview-3.0.0.tar.gz So theoretically, version 3 of hdfview should fix the problem. Unfortunately the build system fails on my machine, being unable to find the hdf libraries installed via apt.