>I am running VS Ent editon. Vfp 6.0 in particular. I have loaded sp 4 already. Completely did a uninstall and re-installed. I 'm getting the following error message every time I place a set step on in my code or I try to run the vfp dbugger. The memory at reference memory (something) not found Memory could not be written.
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>Can anyone tell me what this mean..?

I believe this is Dr.Watson error message you are getting. I get it also sometimes (not necessarily with debugger) and in applications other than VFP too. Generally speaking it is a GPF and I have no idea what in Windows causes it. Can be whatever. Were you getting this kind of errors before you loaded SP4?