# Error in execution of PolyCurve Offset

**URL:** <https://forum.dynamobim.com/t/error-in-execution-of-polycurve-offset/106017>\
**Category:** Revit\
**Tags:** dynamo\
**Created:** [November 21, 2024, 8:39am UTC](https://forum.dynamobim.com/t/error-in-execution-of-polycurve-offset/106017 "2024-11-21T08:39:16Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![earrietaBYDTP](https://avatars.discourse-cdn.com/v4/letter/e/9de0a6/32.png) [@earrietaBYDTP](https://forum.dynamobim.com/u/earrietaBYDTP)\
**Post date:** [November 21, 2024, 8:39am UTC](https://forum.dynamobim.com/t/error-in-execution-of-polycurve-offset/106017/1 "2024-11-21T08:39:16Z")

</div>

Good morning,  
I am new with Dynamo tool.  
I try to create a roof based on the polycurve offset and Dynamo gives me this error when executing: “The union of curves has generated more than one cable in the PolyCurve. A PolyCurve should only have one cable.” Please help.  
Thank you so much.

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/9/7963165137b3a7227449ed1e928522608115e75c.jpeg)

---

<div class="post-metadata">

**Author:** ![\_Vijay](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/_vijay/32/91307_2.png) [@\_Vijay](https://forum.dynamobim.com/u/_Vijay)\
**Post date:** [November 21, 2024, 12:52pm UTC](https://forum.dynamobim.com/t/error-in-execution-of-polycurve-offset/106017/2 "2024-11-21T12:52:38Z")

</div>

Hi @earrietaBYDTP , Welcome to the Community.

Look like too many Closed curve for the roof. try single closed polycurve.

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/1/c1aff7668bbfcc4ef7a90b405cc6771accdfdf0f.png)