"interactive" ends with error message

When I close the shell of an interactive command, Simfactory aborts with an error message (instead of just finishing):

$ exit logout

qsub: job 3847409.abem5.ncsa.uiuc.edu completed Traceback (most recent call last): File "./bin/../simfactory/lib/sim.py", line 141, in <module> main() File "./bin/../simfactory/lib/sim.py", line 138, in main CommandDispatch() File "./bin/../simfactory/lib/sim.py", line 105, in CommandDispatch module.main() File "/u/ac/eschnett/lincoln/EinsteinToolkit-hg/simfactory/lib/sim-manage.py", line 330, in main CommandDispatch() File "/u/ac/eschnett/lincoln/EinsteinToolkit-hg/simfactory/lib/sim-manage.py", line 309, in CommandDispatch exec("command_%s()" % command) File "<string>", line 1, in <module> File "/u/ac/eschnett/lincoln/EinsteinToolkit-hg/simfactory/lib/sim-manage.py", line 92, in command_interactive restart.done() File "/u/ac/eschnett/lincoln/EinsteinToolkit-hg/simfactory/lib/simrestart.py", line 976, in done self.SimulationLog.Close() AttributeError: 'NoneType' object has no attribute 'Close'

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