# Subtraction bug

**URL:** <https://discourse.shapr3d.com/t/subtraction-bug/1369>\
**Category:** Modeling Questions\
**Created:** [August 7, 2017, 6:59pm UTC](https://discourse.shapr3d.com/t/subtraction-bug/1369 "2017-08-07T18:59:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![deets](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/deets/32/594_2.png) [@deets](https://discourse.shapr3d.com/u/deets)\
**Post date:** [August 7, 2017, 6:59pm UTC](https://discourse.shapr3d.com/t/subtraction-bug/1369/1 "2017-08-07T18:59:40Z")

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[Broken.shapr](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a111e4a96d4dd6c4254aef7d492ce6546f0aacbe.shapr) (920 KB)

I haven’t used Shapr In a while. Now I started a new Project. It repeatedly gives me troubles when sketching on a surface & then trying to subtract from the existing shape. The attached file shows the described behaviour for the four circles I’d like to make holes out of.

I can of course work around by creating an extra shape & use the subtraction tool. But that’s cumbersome 🙂

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [August 7, 2017, 7:01pm UTC](https://discourse.shapr3d.com/t/subtraction-bug/1369/2 "2017-08-07T19:01:19Z")

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Unfortunately this is a known issue and it is fixed in the next release, coming in September. Thanks for reporting the problem.