UBB.Developers Forums UBB.threads 7 Development How Do I? forum_thread_data error

NonCGIPath/Forum13/forum_thread_data_0105.cgi: syntax error at NonCGIPath/Forum13/forum_thread_data_0105.cgi line 624, near "q!1"

All of a sudden this error has popped up on one of the forums, I think its because the user has postic a topic with a back slash in it, and its causing that error.

Which file/s should I modify/Delete to delete that topic, so it doesnt get reindex when I rebuild the theads data file.
At the moment it wont rebuild, and keeps comming up with that error while that thread exists, so I need to manually remove any reference to it.

Thanks!