[Bug fortran/98701] I compiled a program with gfortran on Mac (Big Sur, version 11.1) and g77 on Windows 10. I get two very different results for identical input files with the results from the one compiled by gfortran being wrong.

[sgk at troutmask dot apl.washington.edu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98701

--- Comment #12 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sat, Jan 16, 2021 at 11:20:20PM +0000, Bahram.shahrooz at uc dot edu wrote:
> 
> Do you've any suggestions for how to trace the source
> of error so I can fix the code?
> 

Not really.  I suppose  old fashion debugging is needed
where you put 'print' statements into the code to check
intermediate results. As far as I can tell, you simply
are using undefined variables in the code.  This isn't
a gfortran bug, so the bug report will be closed.