Simulation stages cannot be restarted in case of an error

[a-ws-m]

mdpow.restart.start() raises a JournalSequenceError if there is any incomplete stage, even if the stage that you are trying to start is the incomplete one:

JournalSequenceError: Cannot start stage MD_NPT because previously started stage MD_NPT has not been completed.

I think the check should pass if stage == self.current, as well.

[orbeckst]

Yes, that sounds like a logic error in the code.