I have made a tower which consists of 10 levels. If I COC to any of the 10 levels everything is fine. However every time I enter my towers 1st floor from the worldspace entrance I get CTD at random intervals. e.g. sometimes after 3 seconds of entering, sometimes 5 or even 9 seconds after entering. The 10 levels of the tower are all duplicated from teh same interior with things cahnged around on each level. Any help please, driving me bonkers!