# STEP import part modification problem

**URL:** <https://discourse.shapr3d.com/t/step-import-part-modification-problem/20330>\
**Category:** Modeling Questions\
**Created:** [July 13, 2022, 3:22pm UTC](https://discourse.shapr3d.com/t/step-import-part-modification-problem/20330 "2022-07-13T15:22:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![christophe](https://avatars.discourse-cdn.com/v4/letter/c/848f3c/32.png) [@christophe](https://discourse.shapr3d.com/u/christophe)\
**Post date:** [July 13, 2022, 3:22pm UTC](https://discourse.shapr3d.com/t/step-import-part-modification-problem/20330/1 "2022-07-13T15:22:37Z")

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Hello,  
I imported a part in STEP format and I cannot modify, if I reduce or increase a value, it returns to its initial value and shapr says “operation failed because the resulting body wouldn’t valid”

Can you help me solve this problem?

Christophe

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**Author:** ![KPeter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/kpeter/32/7644_2.png) [@KPeter](https://discourse.shapr3d.com/u/KPeter)\
**Post date:** [July 13, 2022, 7:47pm UTC](https://discourse.shapr3d.com/t/step-import-part-modification-problem/20330/2 "2022-07-13T19:47:12Z")

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Hello! There can be many reasons, can you please upload the file and a screen recording of the workflow that ends up in the error message? They would help a lot.

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**Author:** ![christophe](https://avatars.discourse-cdn.com/v4/letter/c/848f3c/32.png) [@christophe](https://discourse.shapr3d.com/u/christophe)\
**Post date:** [July 15, 2022, 12:01pm UTC](https://discourse.shapr3d.com/t/step-import-part-modification-problem/20330/3 "2022-07-15T12:01:51Z")

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Hello,  
Yes, of course, as this procedure is done, I have never done it