>Hi
>
>I got complaint that my exe (vfp) crash the network.
>I look for help where do I have to start from? what is the common things that can cause it?

VFP won't crash a network.

It is, however, possible for a badly written program to soak up network bandwidth by doing huge or badly written queries, or by getting stuck in a loop while moving data across the network.

I'm assuming VFP is not actually running on a network server - only data should be on a server.