It seems it is a common issue that Expeditionpcb CCZ output will make Expeditionpcb crashed if the design is big and complex. I have verified this on 2 designs on 7.9.2. We didn't try to output CCZ before 7.9.2, and don't know whehter previous versions having same symptom, but i think previous versions may have same symptom.
This is maybe a capacity issue. Normally Mentor will say it's ok if you use Windows 7 X64 With 8G. My machine is a 3.0GHz Duo Core with 4G memory(/3G in boot.ini). I have logged on the supportnet and I believe Mentor will ask the test data