# Error message when importing an .obj file as a volume 

**URL:** <https://discourse.slicer.org/t/error-message-when-importing-an-obj-file-as-a-volume/27937>\
**Category:** Support\
**Created:** [February 20, 2023, 8:05pm UTC](https://discourse.slicer.org/t/error-message-when-importing-an-obj-file-as-a-volume/27937 "2023-02-20T20:05:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lily\_Armstrong-Davie](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lily_armstrong-davie/32/18497_2.png) [@Lily\_Armstrong-Davie](https://discourse.slicer.org/u/Lily_Armstrong-Davie)\
**Post date:** [February 20, 2023, 8:05pm UTC](https://discourse.slicer.org/t/error-message-when-importing-an-obj-file-as-a-volume/27937/1 "2023-02-20T20:05:53Z")

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Operating system: macOS  
Slicer version: 5.2.1  
Expected behavior: I’d like my 3D skull .obj thats been edited in C4D to be imported into 3D Slicer as a volume so that I can threshold it and then use WrapSolidify to extrapolate the inside  
Actual behavior: When I upload the .obj through Add Data it imports as a Segmentation but when I try to import as a volume it gives me an Error Message with no information.

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [February 20, 2023, 10:26pm UTC](https://discourse.slicer.org/t/error-message-when-importing-an-obj-file-as-a-volume/27937/2 "2023-02-20T22:26:43Z")

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You should be able to export your segmentation to a binary labelmap volume and then convert that to a scalar volume if needed. But if it’s started as a surface model you won’t be able to threshold it since there’s not continuous tone values, just inside/outside the model. WrapSolidify should work though.