[Pw_forum] File closing errors when using NEB image parallelization

[J. J. Ramsey]

I ran an NEB calcution on a small test system (input file and
pseudohydrogen pseudopotential attached) and ran it two different ways: one where I
ran it on 24 CPUs with nimage=3, and one where I ran it with 8 CPUs and
didn't parallelize on the images (nimage=1). The latter run worked fine
with no apparent errors, but the former ended with these errors,

forrtl: No such file or directory
forrtl: severe (28): CLOSE error, unit 4, file "Unknown"
Image              PC                Routine            Line        Source      
      
pw.x               000000000086D7A6  Unknown               Unknown  Unknown
pw.x               000000000086BAE6  Unknown               Unknown  Unknown
pw.x               0000000000839804  Unknown               Unknown  Unknown
pw.x               00000000007F5336  Unknown               Unknown  Unknown
pw.x               00000000007F4F97  Unknown               Unknown  Unknown
pw.x               00000000007F3CBB  Unknown               Unknown  Unknown
pw.x               000000000054389E  Unknown               Unknown  Unknown
pw.x               00000000004061EB  Unknown               Unknown  Unknown
pw.x               0000000000405F8A  Unknown               Unknown  Unknown
libc.so.6          00002B17DBEDE8B4  Unknown               Unknown  Unknown
pw.x               0000000000405EAD  Unknown               Unknown  Unknown

... repeated several times over, followed by "RETRY EXCEEDED" errors.

In
spite of the errors at the end, both runs, with and without image
parallelization, get me the same answer, and offhand, it looks maybe as if
some processes are trying to close files that had already been closed
by other processes.

James J. Ramsey
University of Akron
Civil Engineering(!) Dept.



      
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