# \#mpi

**URL:** https://discourse.paraview.org/tag/mpi/25.md

[Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md)

---

## [Getting "Byte order could not be determined" error when opening up Ensight Case Gold files written from ANSYS Fluent 2021R2](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250)

<div class="topic-metadata">

**Author:** [@austinbenny](https://discourse.paraview.org/u/austinbenny)\
**Replies:** 18\
**Last updated:** [July 29, 2026, 8:50am UTC](https://discourse.paraview.org/t/getting-byte-order-could-not-be-determined-error-when-opening-up-ensight-case-gold-files-written-from-ansys-fluent-2021r2/12250 "2026-07-29T08:50:07Z")

</div>

My workflow is to have ANSYS Fluent 2021R2 write Ensight Case Gold files that i then post-process in paraview. I could successfully do this before with a different simulation (the ANSYS Fluent version and paraview versio…

---

## [mpiexec for version 6.0.1 (MPI enabled)](https://discourse.paraview.org/t/mpiexec-for-version-6-0-1-mpi-enabled/17269)

<div class="topic-metadata">

**Author:** [@hamed](https://discourse.paraview.org/u/hamed)\
**Replies:** 13\
**Last updated:** [October 29, 2025, 9:58am UTC](https://discourse.paraview.org/t/mpiexec-for-version-6-0-1-mpi-enabled/17269 "2025-10-29T09:58:45Z")

</div>

Hello Paraview community, recently I upgraded to v 6.0.1 and I noticed that calling pvserver by mpiexec prompts n times connection waiting messages. $ mpiexec -n 3 pvserver WRN - The configuration file has not been fo…

---

## [pvbatch on Windows uses many CPU cores by default?](https://discourse.paraview.org/t/pvbatch-on-windows-uses-many-cpu-cores-by-default/16111)

<div class="topic-metadata">

**Author:** [@s1291](https://discourse.paraview.org/u/s1291)\
**Replies:** 12\
**Last updated:** [February 5, 2025, 4:34pm UTC](https://discourse.paraview.org/t/pvbatch-on-windows-uses-many-cpu-cores-by-default/16111 "2025-02-05T16:34:15Z")

</div>

Hi, I have ParaView 5.13.2 (I downloaded ParaView-5.13.2-MPI-Windows-Python3.10-msvc2017-AMD64.msi from the official website) installed on Windows 11. When I try to use pvbatch to render an orbit around a box (.py stat…

---

## [pvpython/pvbatch with MPI Build Causes Deadlock on Consecutive Runs](https://discourse.paraview.org/t/pvpython-pvbatch-with-mpi-build-causes-deadlock-on-consecutive-runs/15710)

<div class="topic-metadata">

**Author:** [@anilbeycorintis](https://discourse.paraview.org/u/anilbeycorintis)\
**Replies:** 3\
**Last updated:** [November 12, 2024, 1:41pm UTC](https://discourse.paraview.org/t/pvpython-pvbatch-with-mpi-build-causes-deadlock-on-consecutive-runs/15710 "2024-11-12T13:41:59Z")

</div>

I’m experiencing an issue with ParaView’s pvpython and pvbatch when using an MPI-enabled build (ParaView-5.11.2-egl-MPI-Linux-Python3.9). Specifically, when I run pvpython or pvbatch scripts multiple times from the same …

---

## [Unable to get D3 filter to work on even modest size unstructured meshes](https://discourse.paraview.org/t/unable-to-get-d3-filter-to-work-on-even-modest-size-unstructured-meshes/15482)

<div class="topic-metadata">

**Author:** [@jwag](https://discourse.paraview.org/u/jwag)\
**Replies:** 5\
**Last updated:** [October 7, 2024, 9:15pm UTC](https://discourse.paraview.org/t/unable-to-get-d3-filter-to-work-on-even-modest-size-unstructured-meshes/15482 "2024-10-07T21:15:17Z")

</div>

I have a large unstructured volume mesh (~400M points) in cgns format that I want to visualize in parallel on a distributed HPC cluster. I have no problem launching an MPI pvserver and connecting to it. The cgns file is …

---

## [mpiexec and cluster](https://discourse.paraview.org/t/mpiexec-and-cluster/15339)

<div class="topic-metadata">

**Author:** [@Nicholas\_Yue](https://discourse.paraview.org/u/Nicholas_Yue)\
**Replies:** 1\
**Last updated:** [September 2, 2024, 3:13pm UTC](https://discourse.paraview.org/t/mpiexec-and-cluster/15339 "2024-09-02T15:13:06Z")

</div>

I am setting up a test cluster (vagrant+virtualbox) to learn more about mpiexec and pvserver The cluster on virtualbox has the following nodes head node-1 node-2 The head node is where I can login to run something li…

---

## [Enable AutoMPI in ParaView 5.11.2](https://discourse.paraview.org/t/enable-autompi-in-paraview-5-11-2/13219)

<div class="topic-metadata">

**Author:** [@Roger1198](https://discourse.paraview.org/u/Roger1198)\
**Replies:** 9\
**Last updated:** [November 9, 2023, 1:16pm UTC](https://discourse.paraview.org/t/enable-autompi-in-paraview-5-11-2/13219 "2023-11-09T13:16:09Z")

</div>

I’ve downloaded ParaView-5.11.2-MPI-Windows-Python3.9-msvc2017-AMD64, and am trying to enable the “AutoMPI” option some of the earlier posts here had mentioned in order to run over multiple processors. I don’t find the o…

---

## [pvserver crashes when calling PipelineContextMenu](https://discourse.paraview.org/t/pvserver-crashes-when-calling-pipelinecontextmenu/13068)

<div class="topic-metadata">

**Author:** [@mahb](https://discourse.paraview.org/u/mahb)\
**Replies:** 2\
**Last updated:** [October 23, 2023, 7:39am UTC](https://discourse.paraview.org/t/pvserver-crashes-when-calling-pipelinecontextmenu/13068 "2023-10-23T07:39:31Z")

</div>

1，run program on 2 pvserver； 2，then user client to connect pvserver， 3，open large datas to read 4，use right botton of mouse to call context menu，pvserver crashes，the flowing is stack Stack trace: 43 0x40…

---

## [When use MPI on two HPC nodes, receive the following error and program will exit](https://discourse.paraview.org/t/when-use-mpi-on-two-hpc-nodes-receive-the-following-error-and-program-will-exit/12605)

<div class="topic-metadata">

**Author:** [@mahb](https://discourse.paraview.org/u/mahb)\
**Replies:** 9\
**Last updated:** [August 3, 2023, 6:10pm UTC](https://discourse.paraview.org/t/when-use-mpi-on-two-hpc-nodes-receive-the-following-error-and-program-will-exit/12605 "2023-08-03T18:10:30Z")

</div>

use paraview 5.9.0,When use MPI on two HPC nodes, receive the following error. How to solve it ？ thanks ^\[\[0m^\[\[31m(7745.250s) \[pvserver.0 \]vtkSocketCommunicator.c:781 ERR| vtkSocketCommunicator (0x1c09c10): Cou…

---

## [Error in CGNSWriter](https://discourse.paraview.org/t/error-in-cgnswriter/12544)

<div class="topic-metadata">

**Author:** [@fra](https://discourse.paraview.org/u/fra)\
**Replies:** 3\
**Last updated:** [July 23, 2023, 8:25pm UTC](https://discourse.paraview.org/t/error-in-cgnswriter/12544 "2023-07-23T20:25:19Z")

</div>

Hi, I have a not so large EnSight Gold multiblock file (~9M cells). I have been trying to read it, perform some simple computations and then resave the data in CGNS. Whether I use (multiple instances of) a pvserver or a…

---

## [Distribution of regular grids incoherent for 16 processes](https://discourse.paraview.org/t/distribution-of-regular-grids-incoherent-for-16-processes/12245)

<div class="topic-metadata">

**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 4\
**Last updated:** [June 12, 2023, 8:51am UTC](https://discourse.paraview.org/t/distribution-of-regular-grids-incoherent-for-16-processes/12245 "2023-06-12T08:51:54Z")

</div>

Hi all, I am using Paraview 5.11.0 and MPI 4.0.3. I have noticed a strange behavior on the distribution of regular grids. In my example, i use the pvserver in mpi for 16 processes: mpirun -n 16 pvserver paraview I …

---

## [procedure entry point "MPI\_WIN\_LOCK\_ALL" could not be located in dynamic link library](https://discourse.paraview.org/t/procedure-entry-point-mpi-win-lock-all-could-not-be-located-in-dynamic-link-library/10829)

<div class="topic-metadata">

**Author:** [@sheth](https://discourse.paraview.org/u/sheth)\
**Replies:** 3\
**Last updated:** [June 6, 2023, 7:22am UTC](https://discourse.paraview.org/t/procedure-entry-point-mpi-win-lock-all-could-not-be-located-in-dynamic-link-library/10829 "2023-06-06T07:22:23Z")

</div>

Downloaded Paraview 5.11.0 and shows the below error: Please guide.

---

## [Creating a mesh editing plugin for paraview ?](https://discourse.paraview.org/t/creating-a-mesh-editing-plugin-for-paraview/11774)

<div class="topic-metadata">

**Author:** [@Mehdi\_Hamidi](https://discourse.paraview.org/u/Mehdi_Hamidi)\
**Replies:** 4\
**Last updated:** [April 10, 2023, 9:26am UTC](https://discourse.paraview.org/t/creating-a-mesh-editing-plugin-for-paraview/11774 "2023-04-10T09:26:29Z")

</div>

Hi, I intend to create a mesh editing plugin for ParaView that will allow users to perform interactive editing of mesh objects in real-time. The goal is to avoid the need to transport the vtk/msh mesh from one software …

---

## [Accessing MPI comm in a pvbatch script](https://discourse.paraview.org/t/accessing-mpi-comm-in-a-pvbatch-script/11637)

<div class="topic-metadata">

**Author:** [@Prathamesh\_Sirmalla](https://discourse.paraview.org/u/Prathamesh_Sirmalla)\
**Replies:** 1\
**Last updated:** [March 16, 2023, 12:21am UTC](https://discourse.paraview.org/t/accessing-mpi-comm-in-a-pvbatch-script/11637 "2023-03-16T00:21:10Z")

</div>

I have a python script which reads a .cgns file, computes my quantities of interest and writes it to a file. Initially I was using pvpython to run this script, but as my data sets are growing I wish to switch to pvbatch.…

---

## [running ParaView in parallel (2)](https://discourse.paraview.org/t/running-paraview-in-parallel-2/11634)

<div class="topic-metadata">

**Author:** [@Rigel](https://discourse.paraview.org/u/Rigel)\
**Replies:** 1\
**Last updated:** [March 15, 2023, 2:47pm UTC](https://discourse.paraview.org/t/running-paraview-in-parallel-2/11634 "2023-03-15T14:47:21Z")

</div>

Hi, I am trying to run ParaView in parallel in a cluster’s visualization node with 36 cores: \[alvesrig@irene7100 fine-hex\]$ whereis mpiexec mpiexec: /ccc/scratch/cont003/gen7178/alvesrig/ParaView-5.10.1-MPI-Linux-Pytho…

---

## [Paraview doesn't perform ray tracing (OSPRay) correctly with MPI](https://discourse.paraview.org/t/paraview-doesnt-perform-ray-tracing-ospray-correctly-with-mpi/11529)

<div class="topic-metadata">

**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 4\
**Last updated:** [March 6, 2023, 1:02pm UTC](https://discourse.paraview.org/t/paraview-doesnt-perform-ray-tracing-ospray-correctly-with-mpi/11529 "2023-03-06T13:02:17Z")

</div>

Hi all. I can’t seem to install Paraview with MPI and OSPRay properly, though my pipeline executes, my output is incorrect. I use Paraview 5.10.1. I have installed OSPRay v2.9.0 (with Embree 3.13.3, Oidn 1.4.3, oneDNN…

---

## [ExtractSurface causes the whole pipeline to execute twice when using MPI](https://discourse.paraview.org/t/extractsurface-causes-the-whole-pipeline-to-execute-twice-when-using-mpi/11539)

<div class="topic-metadata">

**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 2\
**Last updated:** [March 1, 2023, 2:33pm UTC](https://discourse.paraview.org/t/extractsurface-causes-the-whole-pipeline-to-execute-twice-when-using-mpi/11539 "2023-03-01T14:33:59Z")

</div>

Hi all, I have noticed that sometimes Paraview executes twice some filters even when it is not needed when using MPI. I have noticed that this happens when the ExtractSurface filter is present in the Pipeline. I use MP…

---

## [Slurm error when running pvserver with mpiexec.](https://discourse.paraview.org/t/slurm-error-when-running-pvserver-with-mpiexec/10858)

<div class="topic-metadata">

**Author:** [@NotDrJeff](https://discourse.paraview.org/u/NotDrJeff)\
**Replies:** 6\
**Last updated:** [November 30, 2022, 9:05am UTC](https://discourse.paraview.org/t/slurm-error-when-running-pvserver-with-mpiexec/10858 "2022-11-30T09:05:20Z")

</div>

Hello, I have downloaded a linux paraview-5.10 tarball (https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v5.10&type=binary&os=Linux&downloadFile=ParaView-5.10.0-osmesa-MPI-Linux-Python3.9…

---

## [Cannot create Programmable Source using MPI](https://discourse.paraview.org/t/cannot-create-programmable-source-using-mpi/10653)

<div class="topic-metadata">

**Author:** [@lowered\_priora](https://discourse.paraview.org/u/lowered_priora)\
**Replies:** 3\
**Last updated:** [November 7, 2022, 8:21am UTC](https://discourse.paraview.org/t/cannot-create-programmable-source-using-mpi/10653 "2022-11-07T08:21:56Z")

</div>

Hello everyone! I use Paraview 5.10.1 with MPI on Windows Client and Linux Server. I have a problem regarding MPI. My goal is to have a Python module that will be placed both on client and server machine. Python command…

---

## [\[Symbol lookup error\] undefined symbol: mca\_coll\_base\_colltype\_to\_str](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975)

<div class="topic-metadata">

**Author:** [@Changwan\_Sun](https://discourse.paraview.org/u/Changwan_Sun)\
**Replies:** 4\
**Last updated:** [July 8, 2022, 9:56pm UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975 "2022-07-08T21:56:54Z")

</div>

Dear all, OS Name: Ubuntu 20.04.4 I installed Paraview by downloading in the official website and also installed openmpi. After that, I meet this issue when type paraview in the terminal. Before installing the openmpi…

---

## [ParaView GUI not starting after enabling AutoMPI](https://discourse.paraview.org/t/paraview-gui-not-starting-after-enabling-autompi/9806)

<div class="topic-metadata">

**Author:** [@vachan-potluri](https://discourse.paraview.org/u/vachan-potluri)\
**Replies:** 8\
**Last updated:** [June 15, 2022, 4:25am UTC](https://discourse.paraview.org/t/paraview-gui-not-starting-after-enabling-autompi/9806 "2022-06-15T04:25:39Z")

</div>

Dear all, I enabled AutoMPI in ParaView using instructions given here: Paraview parallel - #4 by mwestphal. However, I am unable to open any new GUI after closing that session. The log from the terminal is as follows: …

---

## [Half of ProcessIdScalars values are false for a vti file](https://discourse.paraview.org/t/half-of-processidscalars-values-are-false-for-a-vti-file/9367)

<div class="topic-metadata">

**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 0\
**Last updated:** [April 6, 2022, 8:49am UTC](https://discourse.paraview.org/t/half-of-processidscalars-values-are-false-for-a-vti-file/9367 "2022-04-06T08:49:43Z")

</div>

Hi all, I have issues with using the ProcessIdScalars filter with the GhostCellsGenerator for a Uniform Rectilinear Grid. I first open this data (3.4 KB) that I produced in built in mode using the Wavelet and the Gener…

---

## [Why is pvserver using only one cpu ?](https://discourse.paraview.org/t/why-is-pvserver-using-only-one-cpu/9355)

<div class="topic-metadata">

**Author:** [@Nicholas\_Yue](https://discourse.paraview.org/u/Nicholas_Yue)\
**Replies:** 0\
**Last updated:** [April 5, 2022, 5:33am UTC](https://discourse.paraview.org/t/why-is-pvserver-using-only-one-cpu/9355 "2022-04-05T05:33:54Z")

</div>

I spun out a small 2 node MPI cluster on AWS to get familiar with Paraview in distributed mode. Each node has 2 cores From the head node, I ran the following command /shared/ParaView-5.10.1-osmesa-MPI-Linux-Python3.9-…

---

## [Distribution of data for vtu format files](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199)

<div class="topic-metadata">

**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 1\
**Last updated:** [March 18, 2022, 4:09pm UTC](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199 "2022-03-18T16:09:56Z")

</div>

Hello, I use Paraview 5.10 and openMPI 4.0.3. I want to distribute data in vtu format across MPI processes. I can’t seem to work out how it is supposed to distribute the data. Here is an example to show you my problem: …

---

## [Paraview launching error after setting autompi option](https://discourse.paraview.org/t/paraview-launching-error-after-setting-autompi-option/8663)

<div class="topic-metadata">

**Author:** [@vinodkgul](https://discourse.paraview.org/u/vinodkgul)\
**Replies:** 3\
**Last updated:** [January 7, 2022, 4:33pm UTC](https://discourse.paraview.org/t/paraview-launching-error-after-setting-autompi-option/8663 "2022-01-07T16:33:00Z")

</div>

Dear Friends, In the settings panel, i have enabled Auto MPI option and relaunched paraview. But got following error and paraview GUI does not appear. The screen trace is as follows: AutoMPI: SUCCESS: command is: "/ho…

---

## [Mismatch between .pvtu Pieces count and MPI visualization rank count](https://discourse.paraview.org/t/mismatch-between-pvtu-pieces-count-and-mpi-visualization-rank-count/8674)

<div class="topic-metadata">

**Author:** [@Luke](https://discourse.paraview.org/u/Luke)\
**Replies:** 2\
**Last updated:** [December 28, 2021, 9:42pm UTC](https://discourse.paraview.org/t/mismatch-between-pvtu-pieces-count-and-mpi-visualization-rank-count/8674 "2021-12-28T21:42:23Z")

</div>

Hi Everyone, We have a solver that produces .pvd timeseries data where each element is a .pvtu that links together a bunch of pieces as \_n.vtu that are output independently by each rank. When we visualize this from one…

---

## [pvserver on multiple nodes](https://discourse.paraview.org/t/pvserver-on-multiple-nodes/8477)

<div class="topic-metadata">

**Author:** [@pavel](https://discourse.paraview.org/u/pavel)\
**Replies:** 0\
**Last updated:** [November 24, 2021, 8:59am UTC](https://discourse.paraview.org/t/pvserver-on-multiple-nodes/8477 "2021-11-24T08:59:51Z")

</div>

Hello, I try to run pvserver on two nodes (with Ubuntu 20.04) using mpiexec -n 2 --hosts hostname1,hostname2 pvserver and get an error: =========== 2021-11-24 11:32:52.094 ( 5.146s) \[ 7B911C40\] vtkMPICommuni…

---

## [Remove AutoMPI?](https://discourse.paraview.org/t/remove-autompi/7952)

<div class="topic-metadata">

**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 7\
**Last updated:** [September 8, 2021, 5:26pm UTC](https://discourse.paraview.org/t/remove-autompi/7952 "2021-09-08T17:26:48Z")

</div>

AutoMPI is a boolean setting in ParaView that, when enabled, launches a server process with mpiexec when the ParaView client runs, then the client connects to that server. It was created as a convenient way to enable par…