Custom MinimServer Installation Not Starting

[simoncn]

This error is normally caused by another running instance of MinimServer listening on port 9791. You can run the command minimserver/bin/stopall to ensure that no other processes are running. Please try doing this before you start MinimServer.

I have tried this myself just now and I am unable to provoke the failure because the second MinimServer instance chooses a different port number for listening. By looking at the code that handles the failure, I can see that there are issues with error handling that would cause the stack trace that you posted, but it is difficult to test a fix if I can't provoke the problem.

Perhaps your version of Linux is raising an error whe the second process tries to use the same port but my version (Ubuntu 17.04) doesn't raise an error in this case. In any case, this is a secondary problem as the error handing code won't run if the port conflict is removed.