# Same problem：AI segmentation with lung CT analyzer error

**URL:** https://discourse.slicer.org/t/same-problem-ai-segmentation-with-lung-ct-analyzer-error/41956
**Category:** Support
**Tags:** lungctanalyzer
**Created:** [March 4, 2025, 1:00pm UTC](https://discourse.slicer.org/t/same-problem-ai-segmentation-with-lung-ct-analyzer-error/41956 "2025-03-04T13:00:17Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Republique](https://avatars.discourse-cdn.com/v4/letter/r/ecb155/32.png) [@Republique](https://discourse.slicer.org/u/Republique)
#### Post date: [March 4, 2025, 1:00pm UTC](https://discourse.slicer.org/t/same-problem-ai-segmentation-with-lung-ct-analyzer-error/41956/1 "2025-03-04T13:00:17Z")

</div>

Hi, I’ve been trying to use the Lung CT Analyzer extension with the AI segmentation ‘lung mask’, but I cannot get it to work.  
First,after I put a point in trachea and press apply button,I get a confirmation like:“PyTorch will be downloaded and installed using light-the-torch (ltt install torch torchvision). The process might take some minutes.”  
If I press OK, I will get the following error:Failed to compute results: Command ‘[‘D:/Slicer 5.8.1/bin/…/bin\PythonSlicer.EXE’, ‘-m’, ‘pip’, ‘install’, ‘light-the-torch\>=0.5’]’ returned non-zero exit status 1.  
How can I solve this problem?Thanks in advance!