# How can I reference a polyline in ArchiCAD from Grasshopper, macOS Sierra 10.2.6, Rhino 5.4.2, Archicad 21

**URL:** <https://discourse.mcneel.com/t/how-can-i-reference-a-polyline-in-archicad-from-grasshopper-macos-sierra-10-2-6-rhino-5-4-2-archicad-21/67615>\
**Category:** GH for Mac\
**Created:** [July 25, 2018, 3:53pm UTC](https://discourse.mcneel.com/t/how-can-i-reference-a-polyline-in-archicad-from-grasshopper-macos-sierra-10-2-6-rhino-5-4-2-archicad-21/67615 "2018-07-25T15:53:22Z")\
**Posts on this page:** 1\
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**Author:** ![tim.stark](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/tim.stark/32/704108_2.png) [@tim.stark](https://discourse.mcneel.com/u/tim.stark)\
**Post date:** [July 25, 2018, 4:03pm UTC](https://discourse.mcneel.com/t/how-can-i-reference-a-polyline-in-archicad-from-grasshopper-macos-sierra-10-2-6-rhino-5-4-2-archicad-21/67615/2 "2018-07-25T16:03:24Z")

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> [@Welcome to McNeel Forums](https://discourse.mcneel.com/t/welcome-to-mcneel-forums/483/1):
>
> Welcome to the McNeel Forums! We (the McNeel developers and support team) are glad you’re here. We welcome simple or complex questions, from new or veteran users, about all our products. Translated discussion forums are available in [Italian](http://it.discourse.mcneel.com) and [Chinese](http://chinese.discourse.mcneel.com). Getting Started: Log in! This web site will keep track of what you have read and what is new - whether you read from your phone, your computer, or your tablet - but it can only do that if you log in. Search - in the upper-right corner, sea…

Please read it.

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