>I have a customer who has recently installed one of our applications (VFP6 SP5) on a server running NT4. The server also had an old app written in Fox2.6 (GPDAT - medical software I think). Now when they attempt to run it they get a GPF in the fox2600.esl file.
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>This is the first time I have seen this happen over thousands of installs. As far as I know we do not install anything that will conflict with fox2.6

My guess is that the PIF for the Fox 2.6 app is providing the wrong memory type, or overallocating extended memory suddenly, but FWIW, there's nothing in VFP that affects the runtime ESL.