# Error export planar triangulated mesh in obj file format

**URL:** <https://discourse.mcneel.com/t/error-export-planar-triangulated-mesh-in-obj-file-format/61224>\
**Category:** Rhino for Windows\
**Tags:** bug\
**Created:** [April 23, 2018, 1:57pm UTC](https://discourse.mcneel.com/t/error-export-planar-triangulated-mesh-in-obj-file-format/61224 "2018-04-23T13:57:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![xliotx](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/xliotx/32/520428_2.png) [@xliotx](https://discourse.mcneel.com/u/xliotx)\
**Post date:** [April 23, 2018, 1:57pm UTC](https://discourse.mcneel.com/t/error-export-planar-triangulated-mesh-in-obj-file-format/61224/1 "2018-04-23T13:57:33Z")

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There seems a bug in exporting .obj format in Rhino 6.

For meshes generated from curved surface, everything works fine.  
For meshes generated from a planar surface, the exported .obj file only contains one “f …” line.

Rhino 5 work fine for that.

Screenshot attached:  
Mesh:

 ![image](https://global.discourse-cdn.com/mcneel/original/3X/e/e/ee9c416d0f415c002517e9ca6b3d38d6f34cf490.png)

Rhino 5:

 ![image](https://global.discourse-cdn.com/mcneel/original/3X/3/2/32aeae13572c8e5aeaf3b88f19f16e9579bb24b3.png)

Rhino 6:

 ![image](https://global.discourse-cdn.com/mcneel/original/3X/c/f/cf2b50ad034125586c6c032eb7d6dff320ecf562.png)

This creates issues for existing importers of obj in other geometry processing library.  
(My report error when importing the one from Rhino 6.)

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**Author:** ![tim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/tim/32/507483_2.png) [@tim](https://discourse.mcneel.com/u/tim)\
**Post date:** [May 21, 2018, 9:17pm UTC](https://discourse.mcneel.com/t/error-export-planar-triangulated-mesh-in-obj-file-format/61224/3 "2018-05-21T21:17:00Z")

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uncheck the “create ngons” checkbox and you should get what you did in V5.

 ![image](https://global.discourse-cdn.com/mcneel/original/3X/9/8/98dbd614d2f16df9d1f164205cbb919090ccea35.png)

If you don’t send in the V5 3dm model, the settings you’re using to export and the result you get from V5 and V6 and I’ll take a look.

Tim

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<div class="post-metadata">

**Author:** ![xliotx](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/xliotx/32/520428_2.png) [@xliotx](https://discourse.mcneel.com/u/xliotx)\
**Post date:** [July 20, 2018, 2:56pm UTC](https://discourse.mcneel.com/t/error-export-planar-triangulated-mesh-in-obj-file-format/61224/4 "2018-07-20T14:56:10Z")

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Uncheck NGon works.

Thanks.