Attempt to free unreferenced scalar

System

Anyone got a clue on this one (if I run iwpt_compile.ipl on the command line with one of my templates)? I am sure it's my code that has a bug (unless there's a chance of variable name collision or something) so I don't know why it's claiming PTParser.pm. I've never seen Perl give this error before.

Attempt to free unreferenced scalar at IWHOME\iw-perl\site\5.00503\lib/TeamSite/PTparser.pm line 1370.