# KidneyStoneCalculator

**URL:** <https://discourse.slicer.org/t/kidneystonecalculator/40005>\
**Category:** Support\
**Created:** [November 4, 2024, 1:03am UTC](https://discourse.slicer.org/t/kidneystonecalculator/40005 "2024-11-04T01:03:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ALAN\_ROMAO\_SILVA](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alan_romao_silva/32/78414_2.png) [@ALAN\_ROMAO\_SILVA](https://discourse.slicer.org/u/ALAN_ROMAO_SILVA)\
**Post date:** [November 4, 2024, 1:03am UTC](https://discourse.slicer.org/t/kidneystonecalculator/40005/1 "2024-11-04T01:03:19Z")

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I’m trying to use the KidneyStoneCalculator extension, but my 3D view has nothing and Time of lithotripsy has nothing too.

With this error log:  
1 - vtkMRMLTableNode::GetCellText failed: invalid column index -1  
2 - Extensions-32448/KidneyStoneCalculator/lib/Slicer-5.6/qt-scripted-modules/KidneyStoneCalculator.py", line 480, in run vol\_i=float(resultsTableNode .GetCellText(i,id\_colone\_vmm3)) ValueError: could not convert string to float: ‘’