# Whitematteranalysis install on Ubuntu20.02 errors

**URL:** <https://discourse.slicer.org/t/whitematteranalysis-install-on-ubuntu20-02-errors/24977>\
**Category:** Support\
**Created:** [August 29, 2022, 1:41pm UTC](https://discourse.slicer.org/t/whitematteranalysis-install-on-ubuntu20-02-errors/24977 "2022-08-29T13:41:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mxd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mxd/32/16436_2.png) [@mxd](https://discourse.slicer.org/u/mxd)\
**Post date:** [August 29, 2022, 1:41pm UTC](https://discourse.slicer.org/t/whitematteranalysis-install-on-ubuntu20-02-errors/24977/1 "2022-08-29T13:41:06Z")

</div>

I am on Ubuntu 20.02 system and following the slicer DMRI tutorial , the White MatterAnalysis successfully built, but when I run \>wm\_quality\_control\_tractyography.py --help, I get errors;

Successfully built WhiteMatterAnalysis  
(base) marie@marie-Precision-5820-Tower-X-Series:~$ wm\_quality\_control\_tractography.py --help  
Traceback (most recent call last):  
File “/home/marie/anaconda3/lib/python3.7/site-packages/vtkmodules/vtkIOParallel.py”, line 5, in   
from .vtkIOParallelPython import \*  
ImportError: libjsoncpp.so.19: cannot open shared object file: No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):  
File “/home/marie/anaconda3/bin/wm\_quality\_control\_tractography.py”, line 4, in   
**import** (‘pkg\_resources’).run\_script(‘WhiteMatterAnalysis==0.3.0’, ‘wm\_quality\_control\_tractography.py’)  
File “/home/marie/anaconda3/lib/python3.7/site-packages/pkg\_resources/ **init**.py”, line 667, in run\_script  
self.require(requires)[0].run\_script(script\_name, ns)  
File “/home/marie/anaconda3/lib/python3.7/site-packages/pkg\_resources/ **init**.py”, line 1463, in run\_script  
exec(code, namespace, namespace)  
File “/home/marie/anaconda3/lib/python3.7/site-packages/WhiteMatterAnalysis-0.3.0-py3.7-linux-x86\_64.egg/EGG-INFO/scripts/wm\_quality\_control\_tractography.py”, line 9, in   
import vtk  
File “/home/marie/anaconda3/lib/python3.7/site-packages/vtk.py”, line 32, in   
all\_spec.loader.exec\_module(all\_m)  
File “/home/marie/anaconda3/lib/python3.7/site-packages/vtkmodules/all.py”, line 83, in   
from .vtkIOParallel import \*  
File “/home/marie/anaconda3/lib/python3.7/site-packages/vtkmodules/vtkIOParallel.py”, line 9, in   
from vtkIOParallelPython import \*  
ModuleNotFoundError: No module named ‘vtkIOParallelPython’

Any help would be appreciated.