Here are two informative items to read.

The first is a post regarding ISOGEN made earlier in this Forum (you can find this and others using the [Search] option to the upper right, just above the Calendar). http://www.coade.com/ubbthreads/ubbthrea...h=true#Post5005

The second is the CAESAR II FAQ, which resides on this website. Check the ISOGEN section of this FAQ. http://www.coade.com/product_faq.asp?varflag=CAESARII&varflagmaster=

If the problem persists, e-mail your CAESAR II model to techsupport@coade.com.

When ever you get the error open the PCF file. File is normal ASCII file and notepad can read it. Normally the reason is relatively clear from the file.

ISOGEN based stress ISO is new, good idea but still buggy. Check the output. Sometimes ISOs are wrong/have wrong info. I use the ISO system for all jobs but limiting to areas where I get about correct results. Big time/cost saver and modelling error preventer.

Thanks to replay
But the problem is still there,

Send the CAESAR II model to TechSupport.