# Voxel extraction , Calculation of GLSZM Failed
**URL:** https://discourse.slicer.org/t/voxel-extraction-calculation-of-glszm-failed/14225
**Category:** Radiomics
**Created:** [October 24, 2020, 5:43pm UTC](https://discourse.slicer.org/t/voxel-extraction-calculation-of-glszm-failed/14225 "2020-10-24T17:43:27Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Alessio\_Romita](https://discourse.slicer.org/u/Alessio_Romita)
#### Post date: [October 24, 2020, 5:43pm UTC](https://discourse.slicer.org/t/voxel-extraction-calculation-of-glszm-failed/14225/1 "2020-10-24T17:43:27Z")
Hi everyone ,
I’m trying to calculate the value of Glszm feature using voxel based extraction.
But I got this erro :IndexError: Calculation of GLSZM Failed.
The setting used are :
voxelSetting:
kernelRadius: 2
maskedKernel: true
initValue: nan
voxelBatch: 10000
This just occurred me with glszm feature, instead with glcm the extraction works.
Thanks to anyone who will help me .
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### Author:  [@JoostJM](https://discourse.slicer.org/u/JoostJM)
#### Post date: [November 18, 2020, 6:52pm UTC](https://discourse.slicer.org/t/voxel-extraction-calculation-of-glszm-failed/14225/2 "2020-11-18T18:52:57Z")
Sorry for the late reply. This was a known issue and has since been [fixed](https://github.com/Radiomics/pyradiomics/pull/594) in the latest PyRadiomics release (3.0.1). Did you try with the latest version?
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### Author:  [@Alessio\_Romita](https://discourse.slicer.org/u/Alessio_Romita)
#### Post date: [November 20, 2020, 4:32pm UTC](https://discourse.slicer.org/t/voxel-extraction-calculation-of-glszm-failed/14225/3 "2020-11-20T16:32:39Z")
Hi Joost,
right now I’m just using the glcm features in voxel based extraction. I remembered that I tried to upload it but was the newest version, and the problem still occurred. I will let you know when I will try again with glszm features.