# Totalsegmentator works in fast but not in non-fast

**URL:** <https://discourse.slicer.org/t/totalsegmentator-works-in-fast-but-not-in-non-fast/31417>\
**Category:** Support\
**Created:** [August 29, 2023, 6:53am UTC](https://discourse.slicer.org/t/totalsegmentator-works-in-fast-but-not-in-non-fast/31417 "2023-08-29T06:53:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ylim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ylim/32/68611_2.png) [@Ylim](https://discourse.slicer.org/u/Ylim)\
**Post date:** [August 29, 2023, 6:53am UTC](https://discourse.slicer.org/t/totalsegmentator-works-in-fast-but-not-in-non-fast/31417/1 "2023-08-29T06:53:48Z")

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if fast is not selected -  
Slicer/\_\_SlicerTemp\_\_2023-08-29\_16+39+14.764/segmentation’, ‘–ml’, ‘–task’, ‘total’]’ returned non-zero exit status 120.  
under apply button  
.totalsegmentator\nnunet\results\nnUNet\3d\_fullres\Task251\_TotalSegmentator\_part1\_organs\_1139subj\nnUNetTrainerV2\_ep4000\_nomirror\_\_nnUNetPlansv2.1\fold\_0\model\_final\_checkpoint.model.pkl’

Exception ignored in: \<totalsegmentator.libs.DummyFile object at 0x000001833E38FDC0\>

AttributeError: ‘DummyFile’ object has no attribute ‘flush’

if fast is selected

- solution is achieved.

slicer 5.2.2, pytorch 2.0.1, ndivia 536.67  
Please advise.

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<div class="post-metadata">

**Author:** ![Ylim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ylim/32/68611_2.png) [@Ylim](https://discourse.slicer.org/u/Ylim)\
**Post date:** [August 31, 2023, 7:55am UTC](https://discourse.slicer.org/t/totalsegmentator-works-in-fast-but-not-in-non-fast/31417/2 "2023-08-31T07:55:32Z")

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Can someone please help?