This is actually a very normal thing. I saw the comment in the code. You cannot "sometimes" and "sometimes not" create a "my" variable in some conditional statement and expect that variable will around for use elsewhere. If you do that, you will only have use of it during that "if" clause only. If you violate that, then I think the results are undefined and unpredictable. Maybe I didn't understand what you meant here. This is a very complex module and I don't see the problem and admit such.