# ITK library FactoryRegistration not found

**URL:** <https://discourse.slicer.org/t/itk-library-factoryregistration-not-found/34685>\
**Category:** Support\
**Created:** [March 4, 2024, 8:50am UTC](https://discourse.slicer.org/t/itk-library-factoryregistration-not-found/34685 "2024-03-04T08:50:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Pranali](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pranali/32/69263_2.png) [@Pranali](https://discourse.slicer.org/u/Pranali)\
**Post date:** [March 4, 2024, 8:50am UTC](https://discourse.slicer.org/t/itk-library-factoryregistration-not-found/34685/1 "2024-03-04T08:50:50Z")

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Hi, I’m trying to convert 200 Nifti volumes to Nrrd using Python script for DWI Convert. I’m getting the following error “while loading shared libraries: libITKFactoryRegistration.so: cannot open shared object file: No such file or directory”. how to solve this?

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [March 4, 2024, 1:44pm UTC](https://discourse.slicer.org/t/itk-library-factoryregistration-not-found/34685/2 "2024-03-04T13:44:41Z")

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Probably easiest to run that cli from slicer.

[https://slicer.readthedocs.io/en/latest/developer\_guide/python\_faq.html#how-to-run-a-cli-module-from-python](https://slicer.readthedocs.io/en/latest/developer_guide/python_faq.html#how-to-run-a-cli-module-from-python)