********Address Error IFC 7.1 - Urgent Please Help

********Address Error IFC 7.1 - Urgent Please Help

mads_nayak@yahoo.com's picture
mads_nayak@yahoo.com
Thu, 03/31/2005 - 17:39

Hi,
I am running a huge fortran application that simulates a wave model called swan. It has a series of steps through which the programs reads i/o files. However it always fails at the 38th step(while reading the 38th file) and gives me an "address error", when I ran the program throgh GDB it showed that it fails at the point where there is a "close(file unit)", I am unable to figure out whats wrong, the file unit number is fine and there are no arrays being overstepped at any point. Any help would be greadtly appreciated, I have been struggling with this error for sometime now,

Thanks,
M.

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Steve Lionel (Intel)'s picture
Steve Lionel (Intel)
Thu, 03/31/2005 - 18:01

The only general advice I can give you is to rebuild with a current 8.1 compiler and see if the problem persists. Since the underlying library is entirely different, it probably won't.

Otherwise, some sort of data corruption would be a top suspect. One thing I usually try in this regard is to make test versions that eliminate various parts of the code and see how small I can make it and have the problem remain. If the problem goes away when I remove some code, I look closer at what that code does.

Steve
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mads_nayak@yahoo.com's picture
mads_nayak@yahoo.com
Fri, 04/08/2005 - 16:59

Hi,
I am trying to shorten the code to get to the error point, This si kind of hard since the point of error has too many loops. I am trying t work on that. I had another question. WIll upgrading to Intel compiler 8.1 help?, since the error occurs always at a fixed point in the execution wouldnt it be random if it was due to the compiler? Any thoughts on this,

Thanks,
Madhu.

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Steve Lionel (Intel)'s picture
Steve Lionel (Intel)
Mon, 04/11/2005 - 14:54

If the 7.1 compiler was generating bad code, then I'd expect the error to be consistent. Since we don't KNOW that it's a compiler problem, there is no guarantee that updating will help. But my general advice is to update, as 8.1 is a much better compiler overall.

Steve
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