This sounds like you are running the original release of Version 5.10 ??

This release had a bug with the "Find" operations, which caused a number of problems, one of which was the inability to graphically display overstressed elements. You need to update your installation with the latest build from this website.

If you are not receiving e-mail notices about new builds then you haven't registered your software. I highly recommend that you register your copy of CAESAR II, since this is the only way we have of contacting the user base. You can find the link to register below "Help" on the Main Menu.