# Using STL files from Mimics for Shape Analysis

**URL:** <https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182>\
**Category:** Uncategorized\
**Created:** [October 23, 2023, 12:39am UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182 "2023-10-23T00:39:34Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ltm19](https://avatars.discourse-cdn.com/v4/letter/l/58956e/32.png) [@ltm19](https://shapeworks.discourse.group/u/ltm19)\
**Post date:** [October 23, 2023, 12:39am UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182/1 "2023-10-23T00:39:34Z")

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Hello everyone,

I was wondering if someone may be able to help me with some errors I am receiving. Briefly, we have segmented MRI images in Mimics and exported STL files of tibiae. I get the following two errors when trying to Groom the data set of 6 tibiae using the default values:

1. Warning: Generic Warning: In C:\bdeps\vtk\Common\Core\vtkMath.cxx, line 1334 Unable to factor linear system

2. Warning: Generic Warning: In C:\bdeps\vtk\Common\Core\vtkMath.cxx, line 814 vtkMath: :Jacobi: Error extracting eigenfunctions

I would greatly appreciate some guidance and please let me know if any additional information is required.

Thanks so much!

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**Author:** ![amorris](https://avatars.discourse-cdn.com/v4/letter/a/73ab20/32.png) [@amorris](https://shapeworks.discourse.group/u/amorris)\
**Post date:** [October 23, 2023, 2:36am UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182/2 "2023-10-23T02:36:59Z")

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Can you tell which operation is throwing these warnings?

If possible, could you share one of the STL files with me? amorris@sci.utah.edu

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**Author:** ![ltm19](https://avatars.discourse-cdn.com/v4/letter/l/58956e/32.png) [@ltm19](https://shapeworks.discourse.group/u/ltm19)\
**Post date:** [October 23, 2023, 3:05am UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182/3 "2023-10-23T03:05:34Z")

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Unfortunately, I cannot tell. However, these are the settings I ran. I also just sent an email with one of the STLs. Thanks again for the help! I greatly appreciate it.

![image](https://global.discourse-cdn.com/free1/uploads/shapeworks/original/1X/9bb0a2a51326ccfa7e07fee27bacb10dda554951.png)

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**Author:** ![amorris](https://avatars.discourse-cdn.com/v4/letter/a/73ab20/32.png) [@amorris](https://shapeworks.discourse.group/u/amorris)\
**Post date:** [October 23, 2023, 3:20pm UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182/4 "2023-10-23T15:20:17Z")

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I believe the cause is that this mesh has additional unconnected vertices:

 ![image](https://global.discourse-cdn.com/free1/uploads/shapeworks/original/1X/5c6a62175d29539542804f29050c4f041c448891.png)

 ![image](https://global.discourse-cdn.com/free1/uploads/shapeworks/original/1X/5ab11be225bf1c54ad57e135fdb4e7ef821320c6.jpeg)

It appears to be only a warning though. Does the grooming still appear to be complete/correct?

We should add a mesh ‘isolate’ step to select the largest connected component.

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<div class="post-metadata">

**Author:** ![ltm19](https://avatars.discourse-cdn.com/v4/letter/l/58956e/32.png) [@ltm19](https://shapeworks.discourse.group/u/ltm19)\
**Post date:** [October 23, 2023, 4:27pm UTC](https://shapeworks.discourse.group/t/using-stl-files-from-mimics-for-shape-analysis/182/5 "2023-10-23T16:27:13Z")

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Thank you so much for the help. The grooming does complete and I believe it looks correct. However, are there specific things I should look for to make sure the grooming is done properly?