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Thanks a lot Gottfried, your patch looks very clean! I will commit it as soon as Prabhu and I have fixed the "Order Bug". Good luck!

Just one thing I didn't understand, could you explain this change?

- def SetCurrent(self, current): + def SetCurrent(self, current, missing = None): + if missing is not None: + pass +

This is one of the "fixes" I mentioned in my post. Originally I planned to print a message or throw an exception when missing wouldn't be None because I didn't know what to make of that parameter. Without it I got a 'wrong number of parameters' exception but I somehow got distracted and forgot about it when I came back and didn't get any more of those exceptions. I guess that this parameter should really be called "unused" because it needs to be there only for compatibility to MultipleCodeUnit.SetCurrent(), right?

Thanks again!

my pleasure

Nicodemus.

Cheers, Gottfried