Comment 21 for bug 266554

Got a workaround!

The line referred to in the traceback:
 file(rundig_run_file, 'w').close()
is used to create a 'rundig_last_run' file of lenght 0 bytes
Creating this manually (or copying it) means the line isn't
called and everything seems to work.

Either file() is not a valid function call or my python is broken -
I'm not literate enough in python to know the answer though!