The dataloss issues are not related to this specific issue though. They are purely JLD2 and about the use of mmap which is problematic in hpc contexts. So exact

The dataloss issues are not related to this specific issue though. They are purely JLD2 and about the use of mmap which is problematic in hpc contexts. So exactly when you have to save data that is expensive to produce. See the linked issue. The only workaround is to use an undocumented alternative interface for working on the files. A pull request to at least inform people about the issue has been lying around for almost two years. I am happy that activity has picked up again, but don't intend to recommend the use of JLD2 for expensive data for the foreseeable future...