our comments re FORTRAN are interesting. I discounted the FORTRAN code as a
source of the problem, since the code was identical in the DOS and OS/2
compiles (ie the source code was identical). My rationale was that Watcom
9.5 compiler would produce code which was more or less equally optimized
and would have approximatelt the same run-time. Are you implying that the
FORTRAN code would be the culprit, ie. may be running 30% slower as a DLL
under OS/2? Or worse still, maybe the FORTRAN code is running 100% slower
and any improvement from OS/2 is offset by retarded FORTRAN?

--- Maximus/2 2.01wb