Revision history [back]

From PSSE 34 and 35 a lot of major changes happened in .dll and Fortran (32bit to 64bit, and many older IVF became obsolete). So, if you jumped from 34(or earlier) to 36 then that could be the issue. However, if you went from 35 to 36 then I don't know what could be the issue.

If you indeed went from 34 or earlier to 36, then you could read more about OneAPI and their updated Fortran compiler, because you would need OneAPI (as opposed to Intel Visual Fortran) to compile your Fortran codes