I apologize if this issue has been covered either here or on the beta list but I'm so frustrated... 9 times out of 10 when I run from source, with or without the debugger, and also when I run a built app, without the debugger, as the program "starts", that is after the "compiling" dialog goes away, the app crashes into MacsBug with the following display... User break at 003309A8 EmToNatReturnToEmulated+00438 Mixed Mode Error - CFM couldn't prepare pef in resource, CFM err #-2806, ^<an address which is different each time> I'm running what was distributed on the Release 3 CD; system 9.0.4; compiling for PPC. What is going on? Since it runs sometimes but not others when the source code is the same I question whether it's anything I'm doing. Restarting does not necessarily make the problem go away nor does exiting FB and starting over. I'm really getting frustrated with this environment. Charlie Dickman charlied@...