# The parallel computation failed

**URL:** <https://opentelemac.org/forum/t/the-parallel-computation-failed/8008>\
**Category:** TELEMAC-2D\
**Created:** [May 14, 2025, 6:42am UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008 "2025-05-14T06:42:30Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![user\_18706](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/3bc359/32.png) [@user\_18706](https://opentelemac.org/forum/u/user_18706)\
**Post date:** [May 14, 2025, 6:42am UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008/1 "2025-05-14T06:42:30Z")

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I installed Telemac v8p5 in a Linux environment, and then I ran the command python -m telemac2d xqh.cas --ncsize=4 to perform parallel computing. I encountered the following error:

At line 136 of file /home/slf/TELEMAC/telemac-mascaret-v8p5r0/sources/utils/bief/read\_partel\_info.f (unit = 17, file = ‘T2DPAR00003-00003’)

Fortran runtime error: Bad integer for item 4 in list input

At line 136 of file /home/slf/TELEMAC/telemac-mascaret-v8p5r0/sources/utils/bief/read\_partel\_info.f (unit = 17, file = ‘T2DPAR00003-00002’)

At line 136 of file /home/slf/TELEMAC/telemac-mascaret-v8p5r0/sources/utils/bief/read\_partel\_info.f (unit = 17, file = ‘T2DPAR00003-00001’)

Fortran runtime error: Bad integer for item 3 in list input

I am not sure where the problem lies. My MPI version is mpirun (Open MPI) 4.1.6.

I would greatly appreciate it if anyone could help me.

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**Author:** ![user\_63](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/c4cdca/32.png) [@user\_63](https://opentelemac.org/forum/u/user_63)\
**Post date:** [May 14, 2025, 7:16am UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008/2 "2025-05-14T07:16:58Z")

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Hi

it’s look like the partitioning step doesn’t work correctly.

Look the partel log file

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**Author:** ![user\_3237](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/5fc32e/32.png) [@user\_3237](https://opentelemac.org/forum/u/user_3237)\
**Post date:** [November 5, 2025, 10:52am UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008/3 "2025-11-05T10:52:43Z")

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Hi,

I have exactly the same problem (and no error message in the partel log file).

Did you mange to fix this issue (and how) ?

[name removed]

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**Author:** ![user\_63](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/c4cdca/32.png) [@user\_63](https://opentelemac.org/forum/u/user_63)\
**Post date:** [November 5, 2025, 1:34pm UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008/4 "2025-11-05T13:34:25Z")

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Could you share your files in order to let us try on our side and check?

As Telemac validation ensure sequential and parallel test on different architectures, what you observe is not normal but could be related to your model.

regards

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<div class="post-metadata">

**Author:** ![user\_3237](https://opentelemac.org/forum/letter_avatar_proxy/v4/letter/u/5fc32e/32.png) [@user\_3237](https://opentelemac.org/forum/u/user_3237)\
**Post date:** [November 5, 2025, 2:26pm UTC](https://opentelemac.org/forum/t/the-parallel-computation-failed/8008/5 "2025-11-05T14:26:27Z")

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Hi [name removed],

Thank you for your help.

The IT staff just solved the issue by switching the GNU compilateur de Gnu from 13 to 12.

Everything works well now.

[name removed]