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On windows, a '/' in file name leads to "Fatal error: Too many communicators"

secretyv
Beginner
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As attached file, a small reproducer for a bug in impi on Windows. 

When the file name contains a '/', impi runs out of communicators with MPI_FILE_OPEN/MPI_FILE_CLOSE sequences.

Intel(R) Fortran Intel(R) 64 Compiler Classic for applications running on Intel(R) 64, Version 2021.10.0 Build 20230609_000000
Intel(R) MPI Library for Windows* OS, Version 2021.14 Build 20241121

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TobiasK
Moderator
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@secretyv

thank you for reporting this, we implemented a fix which will be included in the next release, Intel MPI 2021.15, which will be part of oneAPI 2025.2


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