"ERROR: MPI exchange of back wall info timed out [...]" #13457
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It might be helpful to have both the input file and the exact command you used to launch the case. Also, is this the latest code, 6.9.1? |
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Also, this should be submitted as an Issue, not a Discussion. For a Discussion, we cannot assign a specific person to work on it, and what inevitably happens is that it falls far down the list of discussion posts. But as to your inquiry, this error can be caused by a bug in FDS or a "hiccup" in your inter-node network. We have to run the case on our computer to be sure. |
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Posting the entire case in public here or as part of an issue is not possible as it contains client-sensitive data. In this form, the case will run, but naturally not produce sensible results for lack of obstructions. It's just to show that there's nothing too out of the ordinary going on. The case was launched with FDS 6.9.1 with This is the .out file of the original case (again, anonymized and adapted to the rough inputs of the test case above; pressure zone information unaltered). Note the stop and restart after time step 8430. |
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A case of mine crashed with the error message below:
I've never encountered this one before and the relevant lines in the source code don't contain any further comments or information: https://github.com/firemodels/fds/blob/master/Source/main.f90
Looks like a general communication error in the MPI protocol, but why would that happen on back wall info specifically or was this just coincidence?
FDS did not terminate from the error. I had to kill it from Task Manager.
Has anybody encountered this or similar errors before and what was the cause?
This is with Windows 11 Pro on a Core i7 13700H with 16 GB RAM, in case that's relevant.
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