process stays at 99% sometime and write a lot to disk

[synchronicity]

Can you share the exact command line you used to archive the directory containing only a .7z file? And you definitely think the checksum pass is occurring, i.e. it appears that wimlib is reading through the full .7z file before the "Archiving file data" progress starts increasing?

[Gehard]

wim capture d:\ some_network_path\backup.wim
so nothing fancy. We renamed the executable to "wim" to fasten typing on of commands. We are really busy at the moment so we didn't had time to further test wimlib for our use case. We will report as soon as we have done new tests.