# Fill tool error: Invalid body generated

**URL:** <https://discourse.shapr3d.com/t/fill-tool-error-invalid-body-generated/42478>\
**Category:** Modeling Questions\
**Tags:** discourse\
**Created:** [October 29, 2026, 11:14am UTC](https://discourse.shapr3d.com/t/fill-tool-error-invalid-body-generated/42478 "2026-10-29T11:14:02Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![Fengqi\_Song](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/fengqi_song/32/36981_2.png) [@Fengqi\_Song](https://discourse.shapr3d.com/u/Fengqi_Song)\
**Post date:** [October 30, 2026, 4:38am UTC](https://discourse.shapr3d.com/t/fill-tool-error-invalid-body-generated/42478/16 "2026-10-30T04:38:42Z")

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Alright, I totally understand now. Following your advice, I re‑constrained the end control points to maintain tangency at the transition, and it worked out great. Appreciate your patient guidance!

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