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Many thanks for all the comments. I kind of guessed that rounding errors were the cause of the discrepancy, but I didn't realise that 32bit executables were so subject to this issue.

I came across ...

The trivial code below produces what I consider inconsistent results. Specifically there is a difference between results when the mod intrinsic function is presented with a plain argument (c) or with ...

I called it test1.f90
so the command line calls were
ftn95 test1.f90 /link or
ftn95 test1.f90 /link/debug

I trust this is unambiguous.
Louis

Of course I had to rename the file in your post and I used the actual name I had given it and not *.f90

sorry for the confusion I meant I used the command line ftn95 *.f90
My code is still in 77 format rather than f90, so that's my default

I can confirm that with 6.35 I get the same result as yourself, but with 8.0 and 8.82 I have no problem

I'm using FTN95 ver 8.82.0 with command line
ftn95 *.f /link or
ftn95 *.f /link/debug

Dear mecej4
Thats very strange. I took that code and it compiles, links and runs without error. If compiled with /undef/debug it fails of course, because the variables in the module have not been exp ...

Dear Paul
The compiler did not report that the .MOD file was missing, it just hung up.
This was when I created a debug version using the /debug command line flag.

If I created a standard executab ...

Hello
I wasn't complaining that there was no object file for module COM3, but that there was no .MOD file after compilation. If you are compiling code which spreads over many files, I suppose these m ...

Hello
Still trying to track source of the problem. One thing I don't understand is why some .MOD files for modules do not seem to be created and which may be the cause

The code below is taken from ...

Thanks! that does the trick
Louis

Hello
I use the code below to try and see if a window created by another application using createWindow with the caption 'PLATON - Dialog Window'
exists, but the function always returns zero, even i ...

Thanks
I use the command line. Are you suggesting that using smaller files will get round the corrupt object file problem? I'm not really clear why this is happening.
Louis

Thanks Paul
The source file compiles without any problems if I do not use the debug flag. Is the size of the source file the issue here? Its just under 165,000 lines of code. Would splitting it up in ...