# Problem with sweep2 in grasshopper

**URL:** <https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627>\
**Category:** Grasshopper\
**Tags:** windows\
**Created:** [December 7, 2021, 8:19pm UTC](https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627 "2021-12-07T20:19:39Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![holjman.s](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/holjman.s/32/509745_2.png) [@holjman.s](https://discourse.mcneel.com/u/holjman.s)\
**Post date:** [December 7, 2021, 8:19pm UTC](https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627/1 "2021-12-07T20:19:39Z")

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Hi!

I’m having problem with a sweep2 with two rails and three sections. It works fine with the same 5 curves in rhino but in grasshopper I get this “kink” in the middle. I’'ve tried flipping the curves in all different directions and exploded the central curve in rebuilding as an interpolate. Is it a bug or am I doing something wrong?

Appreciate all answers.

Thanks in advance.  
[sweep2 problem.3dm](https://discourse.mcneel.com/uploads/short-url/rlBu2hZMpS1YJSO5wuNK4QFZzQe.3dm) (217.2 KB)  
[sweep2 problem.gh](https://discourse.mcneel.com/uploads/short-url/2Kq7aMVvRJmoQD27hlwHDSnGVVv.gh) (5.6 KB)

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**Author:** ![dale](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/dale/32/685184_2.png) [@dale](https://discourse.mcneel.com/u/dale)\
**Post date:** [December 9, 2021, 12:58am UTC](https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627/2 "2021-12-09T00:58:42Z")

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Hi @holjman.s,

The Sweep2 command does some additional tweaking to the section curves. I’ll see if it’s possible to update the function used by Grasshopper to do the same.

[https://mcneel.myjetbrains.com/youtrack/issue/RH-66617](https://mcneel.myjetbrains.com/youtrack/issue/RH-66617)

– Dale

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**Author:** ![brian](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/brian/32/504171_2.png) [@brian](https://discourse.mcneel.com/u/brian)\
**Post date:** [December 15, 2021, 12:40am UTC](https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627/3 "2021-12-15T00:40:49Z")

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[RH-66617](https://mcneel.myjetbrains.com/youtrack/issue/RH-66617) is fixed in [Rhino 7 Service Release 14](https://www.rhino3d.com/download/rhino/7/latest)

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**Author:** ![anon39580149](https://avatars.discourse-cdn.com/v4/letter/a/977dab/32.png) [@anon39580149](https://discourse.mcneel.com/u/anon39580149)\
**Post date:** [December 15, 2021, 3:42am UTC](https://discourse.mcneel.com/t/problem-with-sweep2-in-grasshopper/134627/4 "2021-12-15T03:42:48Z")

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Hi @dale  
Can you also update Sweep1 to work like Rhino with more settings.

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/4/8/3/4838a7d3237d65f92c461155cd80bb3c5233ecfa.png)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/c/1/c/c1ca623244ebc1a042b7e119151e64d1d0274389.png)