>Hi to all
>
>I have created a COMCodebook Application in VFP7&SP1 on my WinXP Pro machine.
>
>Then i have installed the application in my client machine (PC with Win98 SE), run it, the application crashes.
>
>After i did some searching and testing in the clients machine i found out that the application crashes every time i set a object variable to .NULL.:
>

I haven’t used COM Codebook in a while but I think there is some destructor code that iterates through the class and releases things individually.
If that’s the case, you may want to try commenting out destructor code to check if that’s where the problem lies.