# Invalid curve

**URL:** <https://discourse.shapr3d.com/t/invalid-curve/40723>\
**Category:** Modeling Questions\
**Created:** [April 28, 2026, 11:19pm UTC](https://discourse.shapr3d.com/t/invalid-curve/40723 "2026-04-28T23:19:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tem209](https://avatars.discourse-cdn.com/v4/letter/t/c2a13f/32.png) [@tem209](https://discourse.shapr3d.com/u/tem209)\
**Post date:** [April 28, 2026, 11:19pm UTC](https://discourse.shapr3d.com/t/invalid-curve/40723/1 "2026-04-28T23:19:23Z")

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i had made this piece and wanted to mirror it as I felt that would be the best approach when dealing with a piece like this but when I try it’ll tell me “operation would result in invalid curve”. I haven’t been able to fund the curve in question leading to the error, so any help would be greatly appreciated. Here is also a link to take a better look at it [Shapr3D - Project](https://app.shapr3d.com/p/245fee30-e990-4dff-8381-4cf973540577)

 ![IMG_0194](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/8/a/8a05567ae4a837fe8f7985b3b0d51e2defd15930.jpeg)

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**Author:** ![Dana](https://avatars.discourse-cdn.com/v4/letter/d/9de053/32.png) [@Dana](https://discourse.shapr3d.com/u/Dana)\
**Post date:** [April 30, 2026, 11:02am UTC](https://discourse.shapr3d.com/t/invalid-curve/40723/2 "2026-04-30T11:02:38Z")

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You could try the workaround way by selecting all the curves you need \> change to front or back view \> click copy badge \> center pivot point and rotate 180 degrees.

If then, you’d like it to be 1 sketch, you can project the new sketch to the old one.

This is a work-around, but it might help you in meanwhile, untill you find a solution for your invalid curve.