# Non manifold sketch, how can I fix it?

**URL:** <https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360>\
**Category:** Modeling Questions\
**Created:** [July 15, 2022, 12:24am UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360 "2022-07-15T00:24:23Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![JaxSC](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jaxsc/32/16116_2.png) [@JaxSC](https://discourse.shapr3d.com/u/JaxSC)\
**Post date:** [July 15, 2022, 12:24am UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/1 "2022-07-15T00:24:23Z")

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Hello, I’m very new to Shapr3D, and for a school project I need to make a keychain.  
I went with something a little bit ambitious, but I’ve finished the main sketch, when I tried to extrude it, it said it was non-manifold.  
I understand what non-manifold means, but how can I fix the issue?  
Thanks

I would attach the file but I am not allowed to ☹

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/9/0/909f10fa674855bd3dea55b4e110a325b2d0736e.jpeg)

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**Author:** ![JaxSC](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jaxsc/32/16116_2.png) [@JaxSC](https://discourse.shapr3d.com/u/JaxSC)\
**Post date:** [July 15, 2022, 1:53am UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/2 "2022-07-15T01:53:39Z")

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without reference image

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/b/4/b4d5411c4e2e44269ad49b2566e73d930dc22e1b.png)

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**Author:** ![Laci\_K](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/laci_k/32/8196_2.png) [@Laci\_K](https://discourse.shapr3d.com/u/Laci_K)\
**Post date:** [July 15, 2022, 9:14am UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/3 "2022-07-15T09:14:04Z")

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Usually a good way to figure out the problematic part is to start “splitting” the sketch with lines, and extruding the cut off parts. This way you can identify where the problem is, which part cannot be extruded, then zoom in and look for the problematic sketch section.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [July 15, 2022, 3:16pm UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/4 "2022-07-15T15:16:34Z")

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Good suggestion from @Laci_K.  
If I were to render a guess, it would be in the area I circled in red.

 ![sketch](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/1/c/1cdb0a804f6c2d1a74614f071e456da7630fed15.jpeg)

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [July 15, 2022, 3:31pm UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/5 "2022-07-15T15:31:58Z")

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Same technique I use to find ‘broken’ lines 👍

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<div class="post-metadata">

**Author:** ![JaxSC](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jaxsc/32/16116_2.png) [@JaxSC](https://discourse.shapr3d.com/u/JaxSC)\
**Post date:** [July 16, 2022, 12:19pm UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/6 "2022-07-16T12:19:43Z")

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thank you, I hadn’t thought of that!

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**Author:** ![CutMaster](https://avatars.discourse-cdn.com/v4/letter/c/85f322/32.png) [@CutMaster](https://discourse.shapr3d.com/u/CutMaster)\
**Post date:** [October 8, 2023, 9:07pm UTC](https://discourse.shapr3d.com/t/non-manifold-sketch-how-can-i-fix-it/20360/7 "2023-10-08T21:07:38Z")

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I’ve made a post to ask Shapr3D team to add a feature that could help us find these problems. Meaning if they are able to find them to tell us that it can create a non manifold body, then why not showing us where they have detected the problem?