A few suggestions:

1) Make sure you're running the latest build, which is 070122.

2) Read this previous thread on this subject: http://www.coade.com/ubbthreads/ubbthrea...h=true#Post5005

3) Check the CAESAR II FAQ: http://www.coade.com/product_faq.asp?varflag=CAESARII&varflagmaster=

If problems persist, send the model and the PCF file to techsupport@coade.com.