# Issue with OpenMC Plot Explorer

**URL:** <https://openmc.discourse.group/t/issue-with-openmc-plot-explorer/736>\
**Category:** User Support\
**Created:** [August 31, 2020, 5:42pm UTC](https://openmc.discourse.group/t/issue-with-openmc-plot-explorer/736 "2020-08-31T17:42:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Javier\_Gonzalez](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/javier_gonzalez/32/1095_2.png) [@Javier\_Gonzalez](https://openmc.discourse.group/u/Javier_Gonzalez)\
**Post date:** [August 31, 2020, 5:42pm UTC](https://openmc.discourse.group/t/issue-with-openmc-plot-explorer/736/1 "2020-08-31T17:42:18Z")

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Hi All,

I am trying to use the OpenMC Plot Explorer but unsuccessful so far. I followed the recommended steps for the installation:

git clone [https://github.com/openmc-dev/plotter.git](https://github.com/openmc-dev/plotter.git)  
cd plotter  
pip install .

Apparently the plotter is correctly installed because, after running those commands and some processing, this message is shown “ **Successfully installed openmc-plotter-0.1.0** ”. Then, I go to the folder with the OpenMC results, run “openmc-plotter” and these messages are shown:

* * *

(process:11886): GLib-CRITICAL \*\*: 13:25:29.355: g\_hash\_table\_contains: assertion ‘hash\_table != NULL’ failed

(process:11886): GLib-CRITICAL \*\*: 13:25:29.355: g\_hash\_table\_insert\_internal: assertion ‘hash\_table != NULL’ failed  
Segmentation fault (core dumped)

* * *

Please, does anyone has an idea what is the issue?

Thanks,  
Javier

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**Author:** ![paulromano](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/paulromano/32/486_2.png) [@paulromano](https://openmc.discourse.group/u/paulromano)\
**Post date:** [August 31, 2020, 10:01pm UTC](https://openmc.discourse.group/t/issue-with-openmc-plot-explorer/736/2 "2020-08-31T22:01:46Z")

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Just searching for the error about g\_hash\_table\_contains, it sounds like this has something to do with PySide2 (Python bindings for Qt), which provides the GUI widgets for the plotter application. Are you installing everything in a conda environment by chance? If so, you might want to make sure you start with a clean environment (no packages installed in it) and then install OpenMC followed by openmc-plotter.

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**Author:** ![Javier\_Gonzalez](https://yyz2.discourse-cdn.com/free1/user_avatar/openmc.discourse.group/javier_gonzalez/32/1095_2.png) [@Javier\_Gonzalez](https://openmc.discourse.group/u/Javier_Gonzalez)\
**Post date:** [September 2, 2020, 1:58am UTC](https://openmc.discourse.group/t/issue-with-openmc-plot-explorer/736/3 "2020-09-02T01:58:46Z")

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Hi Paul,  
I did what you suggested and the plotter is working.  
Thanks,  
Javier