I originally reported this to D Opus support, who replied as follows:
All the crashes you submitted were in a third-party DLL called libzmq.dll loaded into the Opus address space.
It’s not part of Opus - it seems to be part of something called NetDrive3 (full path to the DLL is C:\Program Files (x86)\Bdrive\NetDrive3\x64\libzmq.dll).
Unfortunately there’s not much more we can tell at this end, but if you send the same dump files to their tech support they should be able to find out where in their code the crash is occurring.
Can you help, please?
David