# Fillet fail on boss

**URL:** <https://discourse.shapr3d.com/t/fillet-fail-on-boss/20625>\
**Category:** Modeling Questions\
**Created:** [July 29, 2022, 6:02pm UTC](https://discourse.shapr3d.com/t/fillet-fail-on-boss/20625 "2022-07-29T18:02:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Karim](https://avatars.discourse-cdn.com/v4/letter/k/46a35a/32.png) [@Karim](https://discourse.shapr3d.com/u/Karim)\
**Post date:** [July 29, 2022, 6:02pm UTC](https://discourse.shapr3d.com/t/fillet-fail-on-boss/20625/1 "2022-07-29T18:02:49Z")

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Hey I am trying to recreate a part from solid works model mania. But I cannot create a 3mm fillet on the boss part of this model. See photo and model attach.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/3/33b83d76c1477db6010eb217c1d18aed2dd8bf43.jpeg)  
[2021.shapr](https://discourse.shapr3d.com/uploads/short-url/gYOESaCUf6ydhcTUq2WAdOKsUyM.shapr) (27.1 KB)

Thank you.

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [July 29, 2022, 7:29pm UTC](https://discourse.shapr3d.com/t/fillet-fail-on-boss/20625/3 "2022-07-29T19:29:19Z")

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@Macher I was just in the middle of creating a video exactly the same.

@Karim, I’m guessing you got the error message “Cannot fix blends”.

The edges of the boss need to be chamfered first before adding the chamfer where it attaches to the cylindrical part.

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<div class="post-metadata">

**Author:** ![Karim](https://avatars.discourse-cdn.com/v4/letter/k/46a35a/32.png) [@Karim](https://discourse.shapr3d.com/u/Karim)\
**Post date:** [July 29, 2022, 7:49pm UTC](https://discourse.shapr3d.com/t/fillet-fail-on-boss/20625/4 "2022-07-29T19:49:48Z")

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Thank you, I thought the software can resolve it.