Rudy,

These are all O/S level errors. I'm not sure if there is a table somewhere on the MSDN website that lists the error codes. Bottom line is once these errors are triggered there is nothing you can do. The O/S is already in the process of shutting down your app.

When do these errors occur? Have you installed the SP1 for VFP8 on the development machine and put the SP1 runtimes on the users machines?

>With VFP 8 - A new app runs fine on most computers in our client base. However, on some client's computers the system locks up or they get fatal errors. Interestingly, they get different errors at different times. One of the problem clients is running on Windows 2000 SP1.
>
>First question:
>How can I find the meaning (or cause) of Exception Code:
>C0000005
>C0000029
>C0000094
>
>Second question:
>Has anyone encountered this type of strange behavior and found the cause.
>
>Many thanks, any and all replies greatefully appreciated.