# MacOS ParaView 5.6.2 python plugin issue

**URL:** https://discourse.paraview.org/t/macos-paraview-5-6-2-python-plugin-issue/3269
**Category:** Development
**Tags:** python
**Created:** [January 6, 2020, 10:22am UTC](https://discourse.paraview.org/t/macos-paraview-5-6-2-python-plugin-issue/3269 "2020-01-06T10:22:16Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![MBG](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/7ab992/32.png) [@MBG](https://discourse.paraview.org/u/MBG)
#### Post date: [January 6, 2020, 10:22am UTC](https://discourse.paraview.org/t/macos-paraview-5-6-2-python-plugin-issue/3269/1 "2020-01-06T10:22:16Z")

</div>

See the upstream example python plugin here:  
[https://gitlab.kitware.com/paraview/paraview/blob/master/Examples/Plugins/PythonAlgorithm/PythonAlgorithmExamples.py](https://gitlab.kitware.com/paraview/paraview/blob/master/Examples/Plugins/PythonAlgorithm/PythonAlgorithmExamples.py)

On ParaView 5.6.2 for PythonSuperquadricSource doesn’t work choosing a string from the list of strings:

```
ERROR: In /Users/kitware/dashboards/buildbot-slave/a64f5607/build/superbuild/paraview/src/ParaViewCore/ServerImplementation/Core/vtkPVSessionCore.cxx, line 371

vtkPVSessionCore (0x7fd4f7a12640): Failed to convert return value from 'GetValueRange'.

while processing

Message 0 = Invoke

Argument 0 = vtk_object_pointer {vtkPythonAlgorithm (0x7fd4f8615fd0)}

Argument 1 = string_value {GetValueRange}

```

Actually, I have a set of dynamic field names for my data sources. Is it possible to allow user selection for one of them by some way?