Can you attach the exact script you were using? Or at least say what the error was? Because so far, there isn't much to go on in this bug, unfortunately.
It was a while back, I've since just compensated and changed my code as a workaround. I'll try to replicate it again and post the error I was given.
Post the code too, please? As things stand, there's really nothing we can do here...
Feel free to reopen if you produce a testcase.