Fortran Absolute

[JohnNichols]

subroutine a(i)
implicit none
integer i
write(*,*)i
return 
end subroutine a
call a(abs(1))

is this call legal, it works sometimes, but occasionally it seems to miss the number.  

[Arjen_Markus]

Looks perfectly legal to me - except that you need an "end" statement. But when you say it occasionally seems to miss the number, can you say under what circumstances and how does it miss the number?

[JNichols]

The problem has been occurring in a call that had some allocated arrays passed at the same time.  

I think I found the problem, by slowly working up for just this example to a full set of arguments and making the arrays last.  

[JNichols]

It was a weird error and one that took a couple of hours to work through and check everything.  

It surprised me.