Im porting a program written in fortran 90/95 unix to QVF6.5 pc. After fixing some small problems i am able to compile and run the program. The problem is that the calculated results differ from the old version. My question is if there is any known conversion errors, let's say datatypes that aren't the same or other things that can cause wrong calculations but without causing compiler errors?
(the program is BIG, and I haven't written the original)