# Error when using filters

**URL:** <https://discourse.slicer.org/t/error-when-using-filters/2732>\
**Category:** Support\
**Created:** [April 30, 2018, 8:27am UTC](https://discourse.slicer.org/t/error-when-using-filters/2732 "2018-04-30T08:27:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![FungalSlicer](https://avatars.discourse-cdn.com/v4/letter/f/e8c25b/32.png) [@FungalSlicer](https://discourse.slicer.org/u/FungalSlicer)\
**Post date:** [April 30, 2018, 8:27am UTC](https://discourse.slicer.org/t/error-when-using-filters/2732/1 "2018-04-30T08:27:59Z")

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Hey guys,

maybe someone has an idea about this sort or error, which I get when using some basic image filters:

Median Image Filter standard error:

Median Image Filter standard error:

C:/Program Files/Slicer3D/Slicer 4.9.0-2018-04-29/lib/Slicer-4.9/cli-modules/MedianImageFilter.exe: exception caught !

itk::ImageFileReaderException (0000000158CFEC38)  
Location: “unknown”  
File: d:\d\p\slicer-0-build\itkv4\modules\io\imagebase\include\itkImageFileReader.hxx  
Line: 143  
Description: Could not create IO object for reading file C:/Users/User/AppData/Local/Temp/Slicer/GGEJG\_vtkMRMLScalarVolumeNodeB.nrrd  
The file doesn’t exist.  
Filename = C:/Users/User/AppData/Local/Temp/Slicer/GGEJG\_vtkMRMLScalarVolumeNodeB.nrrd

Thank you in advance,

FungalSlicer

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**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:** [April 30, 2018, 1:18pm UTC](https://discourse.slicer.org/t/error-when-using-filters/2732/2 "2018-04-30T13:18:27Z")

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Do filters work with SampleData (e.g. MRHead) or is this specific to your data?

(Note: median filter and others work fine for me with a recent windows nightly).

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [April 30, 2018, 6:27pm UTC](https://discourse.slicer.org/t/error-when-using-filters/2732/3 "2018-04-30T18:27:12Z")

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Make sure your temporary folder is writeable - menu: Application settings / Modules / Temporary directory.

Something is odd about how Slicer is installed, as the path in the error message refers to C:/Program Files/ **Slicer3D** /Slicer 4.9.0-2018-04-29/lib/Slicer-4.9/cli-modules/MedianImageFilter.exe - while it is normally “c:\Program Files\Slicer 4.9.0-2018-04-29\lib\Slicer-4.9\cli-modules\MedianImageFilter.exe”.

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**Author:** ![FungalSlicer](https://avatars.discourse-cdn.com/v4/letter/f/e8c25b/32.png) [@FungalSlicer](https://discourse.slicer.org/u/FungalSlicer)\
**Post date:** [May 3, 2018, 11:45am UTC](https://discourse.slicer.org/t/error-when-using-filters/2732/4 "2018-05-03T11:45:39Z")

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thank you, that solved it 🙂