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New Contributor I
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Fortran EXE

Is anyone aware of why the FORTRAN exe file contains a line at the top that says == This program cannot run in DOS MODE?

It is 25 years since people used DOS? 

Interesting 

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New Contributor I
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https://docs.microsoft.com/en

https://docs.microsoft.com/en-us/windows/win32/debug/pe-format

Answered my own question a few minutes later -- the DOS stub is at the start of all EXE programs and gives an error message if executed 

Interesting 

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New Contributor II
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It is a consequence of

It is a consequence of backward compatibility. DOS and extended applications had to cohabit for a while so this stub was mandatory to avoid launching a mismatched application.

There are many other things like that under Windows and even I think Linux.

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