I have been using my new 6.0 version of IronCAD for about two days and have noticed a huge increase in the number of times it has given me the abnormal runtime error and program termination errors. It seemed like version 5.2 was excellent with regards to crashing but now that I can use the plane features on the triball I could never go back. I have an older machine 400Mhz , Nvidia Riva TNT2, 786MB Ram. Any one else having trouble?