# Error when running partitioned mesh: Kernel grouping violates dependencies

**URL:** <https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141>\
**Category:** General\
**Created:** [30 July 2024 16:34 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141 "2024-07-30T16:34:00Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pyfr\_starting\_man](https://avatars.discourse-cdn.com/v4/letter/p/d26b3c/32.png) [@pyfr\_starting\_man](https://pyfr.discourse.group/u/pyfr_starting_man)\
**Post date:** [30 July 2024 16:34 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141/1 "2024-07-30T16:34:00Z")

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Whenever I am running my case with a simple 3D airfoil without a partition it runs fine (except for taking a long time). However, when I partition it into 4, I am getting a strange error message when running mpiexec -n 4 pyfr -p run -b cuda airfoil\_part/airfoil\_pyfr2.pyfrm airfoil\_pyfr.ini. Attached is the error message I am receiving.

 ![error message](https://global.discourse-cdn.com/free1/uploads/pyfr/original/1X/2c51fddf63e5333d6a1bbb2c74dfec03e68738d2.png)

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**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\
**Post date:** [30 July 2024 17:29 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141/2 "2024-07-30T17:29:00Z")

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What version of PyFR are you using?

Peter

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<div class="post-metadata">

**Author:** ![pyfr\_starting\_man](https://avatars.discourse-cdn.com/v4/letter/p/d26b3c/32.png) [@pyfr\_starting\_man](https://pyfr.discourse.group/u/pyfr_starting_man)\
**Post date:** [30 July 2024 17:30 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141/3 "2024-07-30T17:30:37Z")

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I am using version 2.0.1.

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<div class="post-metadata">

**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\
**Post date:** [30 July 2024 18:06 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141/4 "2024-07-30T18:06:47Z")

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Try updating to the most recent release. That should fix the issue.

Peter

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<div class="post-metadata">

**Author:** ![pyfr\_starting\_man](https://avatars.discourse-cdn.com/v4/letter/p/d26b3c/32.png) [@pyfr\_starting\_man](https://pyfr.discourse.group/u/pyfr_starting_man)\
**Post date:** [30 July 2024 18:48 UTC](https://pyfr.discourse.group/t/error-when-running-partitioned-mesh-kernel-grouping-violates-dependencies/1141/5 "2024-07-30T18:48:03Z")

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What is the best way to update pyfr without losing any of my dependencies like MÉTIS for example. It took me forever to get all of that set up. Thanks for your help.