# A polycurve question

**URL:** <https://forum.dynamobim.com/t/a-polycurve-question/2973>\
**Category:** Packages\
**Created:** [January 20, 2016, 12:37am UTC](https://forum.dynamobim.com/t/a-polycurve-question/2973 "2016-01-20T00:37:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![111183](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/111183/32/45576_2.png) [@111183](https://forum.dynamobim.com/u/111183)\
**Post date:** [January 20, 2016, 12:37am UTC](https://forum.dynamobim.com/t/a-polycurve-question/2973/1 "2016-01-20T00:37:04Z")

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when I join lines to polycurve,it can’t offset on plane xy, it go to Z vector.  
when I offset polycurve,it trans to a curve ， I can’t break it to lines or linelikecurves.

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**Author:** ![Vikram\_Subbaiah](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/vikram_subbaiah/32/50797_2.png) [@Vikram\_Subbaiah](https://forum.dynamobim.com/u/Vikram_Subbaiah)\
**Post date:** [January 20, 2016, 12:57am UTC](https://forum.dynamobim.com/t/a-polycurve-question/2973/2 "2016-01-20T00:57:10Z")

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Ensure that the polycurve you are trying to offset is planar

 ![20160120-5](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/d/dfe29b5deb0dbfdceb2daa5a94cb8cf94ee7036e.png)