# I can’ t understand why I’m not able to extrude

**URL:** <https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808>\
**Category:** Modeling Questions\
**Created:** [November 7, 2023, 7:10pm UTC](https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808 "2023-11-07T19:10:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ecreatures](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/ecreatures/32/15450_2.png) [@ecreatures](https://discourse.shapr3d.com/u/ecreatures)\
**Post date:** [November 7, 2023, 7:10pm UTC](https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808/1 "2023-11-07T19:10:11Z")

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I did this outline in sketch mode joining two half (one have been designed and the othe half mirrored from the first).  
Then I cannot get this outline extruded. When I tap on it it never get filled in blue with the up arrow.  
What am I missing and how may I get around this issue?

 ![IMG_0364](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/3/63867c7d082fb3120a55a08ff86690bd2d500d93.jpeg)

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**Author:** ![McD](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/mcd/32/15504_2.png) [@McD](https://discourse.shapr3d.com/u/McD)\
**Post date:** [November 7, 2023, 7:31pm UTC](https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808/2 "2023-11-07T19:31:03Z")

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There is likely a small gap somewhere. Perhaps your mirroring line wasn’t exactly on the edge of the first sketch? Or the first sketch has a tiny gap.

What I do is select the sketch and see if the entire line is highlighted. If not, and I see another portion of the line not highlighted, this leads me to suspect that intersection where the two lines meet.

When mirroring, I usually draw a line between the edge of the original sketch. I use this to mirror, then deleted it. This ensures I mirror without a gap.

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**Author:** ![ecreatures](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/ecreatures/32/15450_2.png) [@ecreatures](https://discourse.shapr3d.com/u/ecreatures)\
**Post date:** [November 7, 2023, 8:11pm UTC](https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808/3 "2023-11-07T20:11:00Z")

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I had a center line too that I erased yet. I’ll try to perform a continuity check.  
Thaks for helping

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**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [November 8, 2023, 5:30am UTC](https://discourse.shapr3d.com/t/i-can-t-understand-why-i-m-not-able-to-extrude/28808/4 "2023-11-08T05:30:53Z")

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Draw a line across your sketch, the highlighted part is closed. Continue this method on the on the rest of the parts. Then zoom in on the suspicious part of your sketch.