Which version of VFP are you using? If you can upgrade to VFP Service Pack 3 or Service Pack 4, a lot of these errors are prevented. If not, check out the following article on the Fox Wiki:

http://fox.wikis.com/wc.dll?Wiki~C0000005ExError~VFP

>Hello in my aplication when the user run a form the VFP show the message
>Fatal error:Execption code=C0000005
>Called from - ...
>
>Some idea, how eliminate this error
>
>Very Thank you
>
>CAIOOOOoooooooooooooooo.....