I'll have to check, but I don't think it's doing anything more than 386 optimizations. The other program that has trouble communicating with gnuplot I only have as a binary, and I think a MS compiler was used for it. It was built around 2004.

I have a copy of Builder 6, but it is different enough in compiling our code that it was decided not to do the upgrade. The errors and warnings thrown up compiling the code with 6 may be indicative of real issues, but since it works fine on almost all of our machines, well...

So far Memtest86 hasn't found any errors with the Standard memory tests on the T61. It throws up errors if I tell it to test All the RAM, rather than only that IDed by the BIOS. Dunno if that's meaningful though...

Oh well, I'll probably just live with it and slowly migrate the BC++ code to Python, and use the problematic binaries on machines that don't have trouble with it. It does give me pause to think about a new fast laptop, though...

Thanks.

Cheers,
Scott.