# Issues Using SegmentMesher Extension

**URL:** <https://discourse.slicer.org/t/issues-using-segmentmesher-extension/2924>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [May 24, 2018, 8:17pm UTC](https://discourse.slicer.org/t/issues-using-segmentmesher-extension/2924 "2018-05-24T20:17:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gswai123](https://avatars.discourse-cdn.com/v4/letter/g/f08c70/32.png) [@gswai123](https://discourse.slicer.org/u/gswai123)\
**Post date:** [May 24, 2018, 8:17pm UTC](https://discourse.slicer.org/t/issues-using-segmentmesher-extension/2924/1 "2018-05-24T20:17:48Z")

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Operating system: macOS High Sierra (10.13.4)  
Slicer version: 4.9.0 (Nightly Build)

Hello,

I am very new to 3D Slicer (this is my third day using it). I want to be able to make a volumetric mesh from a brain scan for finite element analysis using the SegmentMesher Extension. I have created a segmentation (I think) using the sample data MRBrainTumor1. I input my segmentation and the correct parameters for Cleaver, as instructed here: [GitHub - lassoan/SlicerSegmentMesher: Create volumetric mesh from segmentation using Cleaver2 or TetGen](https://github.com/lassoan/SlicerSegmentMesher). However, I get the following error when I hit Apply: "Error: ‘module’ object has no attribute ‘STARTUPINFO’ ". Does anybody know what I’m doing wrong? I’m attaching a screenshot of what my 3D slicer looks like.

 ![08%20PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/d/9d6806cd6f46d820ec01885bde39359f7ba91dcf.png)

Thanks!

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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:** [May 24, 2018, 8:33pm UTC](https://discourse.slicer.org/t/issues-using-segmentmesher-extension/2924/2 "2018-05-24T20:33:07Z")

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Thanks for reporting this. I’ve updated the module so that it should work now. You can either apply [this change](https://github.com/lassoan/SlicerSegmentMesher/commit/e124d6c25cdf05cb7aff2961abd1fe1127bb98c8) on your local copy of SegmentMesher.py or re-install the SegmentMesher extension tomorrow.