Yesterday I installed a couple of Win98 machines for a client who is running a program I wrote in FPWin 2.5 some years ago.

To my horror, I found the program would not work, though it works fine on the Win 3.1 machines.

Are there any known incompatibilities between FPWin 2.5 and Win98? Can anyone point me to some resources on this?

Specifically, I am getting this. FPWin 2.5 loads just fine and my main .app file executes. This app presents the user with a "menu" of command buttons which launch various modules. Each of these modules is a separate .app file. When I click on any of the buttons, I get a really old-style GPF, advising me to "Ignore" or "Close." Alas, as there was no source code on sight, I cannot nail down when this happened, either before or after the module .app was called.

As always, TIA,