# \[Symbol lookup error\] undefined symbol: mca\_coll\_base\_colltype\_to\_str

**URL:** https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975
**Category:** ParaView Support
**Tags:** mpi
**Created:** [July 6, 2022, 4:12am UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975 "2022-07-06T04:12:30Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Changwan\_Sun](https://discourse.paraview.org/user_avatar/discourse.paraview.org/changwan_sun/32/9239_2.png) [@Changwan\_Sun](https://discourse.paraview.org/u/Changwan_Sun)
#### Post date: [July 6, 2022, 4:12am UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975/1 "2022-07-06T04:12:31Z")

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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, I was able to use the Paraview without any problem.

`Invalid MIT-MAGIC-COOKIE-1 keyInvalid MIT-MAGIC-COOKIE-1 keyparaview: symbol lookup error: /usr/local/lib/openmpi/mca_coll_han.so: undefined symbol: mca_coll_base_colltype_to_str `

What can I do to address this issue?

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 6, 2022, 8:28am UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975/2 "2022-07-06T08:28:44Z")

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That is unexpected, does the issue goes away if you remove openmpi ?

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### Author: ![Changwan\_Sun](https://discourse.paraview.org/user_avatar/discourse.paraview.org/changwan_sun/32/9239_2.png) [@Changwan\_Sun](https://discourse.paraview.org/u/Changwan_Sun)
#### Post date: [July 6, 2022, 12:07pm UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975/3 "2022-07-06T12:07:57Z")

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Thanks for your quick reply. I will try your suggestion!

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### Author: ![Changwan\_Sun](https://discourse.paraview.org/user_avatar/discourse.paraview.org/changwan_sun/32/9239_2.png) [@Changwan\_Sun](https://discourse.paraview.org/u/Changwan_Sun)
#### Post date: [July 7, 2022, 1:21am UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975/4 "2022-07-07T01:21:53Z")

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Good. it’s working. I went to the fold that I downloaded and entered below.

`sudo make all uninstall`

Then I restarted the terminal and typed the `paraview`. it’s working!

I referred this site:[[OMPI users] Unistall open-mpi](https://users.open-mpi.narkive.com/jEwTRgy6/ompi-unistall-open-mpi)

Thanks a lot!

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### Author: ![ben.boeckel](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@ben.boeckel](https://discourse.paraview.org/u/ben.boeckel)
#### Post date: [July 8, 2022, 9:56pm UTC](https://discourse.paraview.org/t/symbol-lookup-error-undefined-symbol-mca-coll-base-colltype-to-str/9975/5 "2022-07-08T21:56:54Z")

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This is because our binaries use MPICH. OpenMPI is not ABI-compatible, so it cannot be found by something like `LD_LIBRARY_PATH` when using ParaView.