No, they just need full access/permissions for the DirectRT folder. However, I'm curious--if you simply divide the session into two seperate sessions, will they each run error free on these machines? i.e., as opposed to truncating it.

Just curious because if so, that would suggest the problem is one of system resources. Otherwise it may be an input file issue that only occurs on these machines for some reason.

In that regard, you mentioned tha lab computer is running 2004.3.27--is that the same as on your laptop?