# “Bad argument” when trying to revolve

**URL:** <https://discourse.shapr3d.com/t/bad-argument-when-trying-to-revolve/4973>\
**Category:** Modeling Questions\
**Created:** [June 22, 2019, 5:09pm UTC](https://discourse.shapr3d.com/t/bad-argument-when-trying-to-revolve/4973 "2019-06-22T17:09:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ethos6](https://avatars.discourse-cdn.com/v4/letter/e/b9bd4f/32.png) [@Ethos6](https://discourse.shapr3d.com/u/Ethos6)\
**Post date:** [June 22, 2019, 5:09pm UTC](https://discourse.shapr3d.com/t/bad-argument-when-trying-to-revolve/4973/1 "2019-06-22T17:09:46Z")

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New to Shaper and working through the instructional videos. While following the revolve video I was able to revolve around an axis for the solid shape. However once I did an offset to creat a hollow body I keep getting “Bad argument” error. Not sure what I am doing wrong. How do I find out what the Bad argument is and resolve it?

Thanks.

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [June 22, 2019, 5:10pm UTC](https://discourse.shapr3d.com/t/bad-argument-when-trying-to-revolve/4973/2 "2019-06-22T17:10:56Z")

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Hi, and welcome! Can you post a screenshot?