I've been trying to fix this C0000005 fatal error for 1 week know, I never got the error at development time but when I created my distributable disks and installed the application in users machines, it showed up.

After It starting showing up intermitently I was reading and trying a lot of stuff in the UT.

Some of the stuff I tryed is installing VS SP1, NT SP4, and other things like ON SHUT CLEAR EVENTS.
But just until today i figured what is causing my problem, If I start the runtime version with the screen off, when my main form comes up I crash getting the fatal error, so in case this is happening to somebody, try to start the application with screen = ON or _VFP5.SCREEN.VISIBLE = .T..

I hope this helps.