Re: matmul trouble


"Louis Krupp" <lkrupp@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:1393jba9n530lfd@xxxxxxxxxxxxxxxxxxxxx
Richard Maine wrote:
Richard Maine <nospam@xxxxxxxxxxxxx> wrote:

Wade Ward <invalid@xxxxxxxxxxxx> wrote:

I thought matmul was the culprit, but it's the write statement.
Well. That's where you see the error. That doesn't necessarily mean that
is actually where the problem is....
Probably the first pointless fiddle I'd do would be to take the matmul
out of the picture by doing something trivial like z = x instead of the
matmul.

And another might be to take the advance='no' off of the prior write.
(No, I don't have any good reason for that. It is probably completely
pointless. But well... maybe if the advance='no' doesn't leave the I/O
system in a good state for some reason...)
I took that off and uncommented the matmul. Same runtime error.

Along those lines, I would try initializing x within the program and then
calling matmul and printing the result; it gets the read statement out of
the picture.
I find no example of this in MR&C. This initialization fails:
program maine4
integer :: x(2,2), z(2,2)
OPEN(11, File="output4.txt",STATUS='REPLACE')
write (*,'(a)') 'Give me ints: '
x = (/1,2,3,4/)
z =x
!z = matmul(x,x)
write (11,'(i4)') z
close(11)
end program maine4
--
WW


.

Relevant Pages

  • Re: matmul trouble
    ... Probably the first pointless fiddle I'd do would be to take the matmul ... end program maine4 ... If a simple initialization followed by a call to matmul fails, it might be worth checking that you're linking against the correct library. ...
    (comp.lang.fortran)
  • Re: matmul trouble
    ... If I were sitting in front of the machine with code that ... Probably the first pointless fiddle I'd do would be to take the matmul ... I would try initializing x within the program and then calling matmul and printing the result; it gets the read statement out of the picture. ...
    (comp.lang.fortran)
  • Re: matmul trouble
    ... If I were sitting in front of the machine with code that ... Probably the first pointless fiddle I'd do would be to take the matmul ... end program maine3 ...
    (comp.lang.fortran)
  • Re: matmul trouble
    ... Richard Maine wrote: ... through several dozen fruitless things before getting much of a hint. ... Probably the first pointless fiddle I'd do would be to take the matmul ...
    (comp.lang.fortran)