>I still have some clients running executables built in FPW26. With original version of Windows 98 there was no problem, but with Version B. I get an OS error, which if ignored, give another error say there is a problem with the EXE. Any suggestions ?
>

I'd suspect the speed of the processor rather than the OS version - 2.6 has a known problem with faster processors. MS published a patch on their web site; it's also findable from www.abri.com