>I have just installed VFP 7 on my development machine.
>I recompiled by form and set a breakpoint just before an error I have and the trace window of the Debugger states "Source not available".
>I have other forms that I have experimented with and they show the code properly.
>What is causing this problem on this form?

Usually, one of two things:

(1) The source files being found are from an earlier version, or
(2) The date/time stamp on the code file postdates the compiled code date/time stamp.

Try recompiling all modules, and removing any old versions of the code from the VFP search path when debugging.