# Polycurve from corridor featureline **URL:** \ **Category:** Civil 3D\ **Created:** [November 29, 2020, 7:53am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797 "2020-11-29T07:53:53Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![shahid.shaikh\_C3D](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@shahid.shaikh\_C3D](https://forum.dynamobim.com/u/shahid.shaikh_C3D)\ **Post date:** [November 29, 2020, 7:53am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/1 "2020-11-29T07:53:53Z")
Hi All, I am trying to get the auto corridor featureline geometry to Dynamo polycurve but geomtry nodes are returning null value. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/f/af72906c792018af52ac68fb5cd021651828873a.png) anyway around or am i missing on any node ? ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/5/d5b1108a18c55e44bc7c596aaee51c6fd669af7a.png) Even tried with removing Dynamic link to featureline and still cant get the polycurve representation of featureline. if i create a featureline from polyline and then created polycurve, it worked. (Kindly note i am having a corridor created on dynamic fatureline so cant use corridor featureline nodes.) Thanks for the support. ---
**Author:** ![Drbohlav](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/drbohlav/32/113004_2.png) [@Drbohlav](https://forum.dynamobim.com/u/Drbohlav)\ **Post date:** [November 29, 2020, 11:45am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/2 "2020-11-29T11:45:53Z")
Hi @shahid.shaikh_C3D, I believe you will find solution here in dataset from this online AU presentation Supercharge Your Dynamo Graph with Civil 3D Toolkit > [@Civil 3D Toolkit Feedback thread](https://forum.dynamobim.com/t/civil-3d-toolkit-feedback-thread/43570/625): > > Hello fellow Civil3D Toolkit users, Just want to share my AU Class in this thread. This can help new user understand the basic of Civil 3D Toolkit. Please download the sample data set there as well. Thank you Paolo and Safi amazing package. Edited below: Link to show how to make the speed 2x faster in AU. [[How to speed up playback of Autodesk University classes] ](https://www.youtube.com/watch?v=S_tjIQ9miAE) Cheers, Jowenn ---
**Author:** ![shahid.shaikh\_C3D](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@shahid.shaikh\_C3D](https://forum.dynamobim.com/u/shahid.shaikh_C3D)\ **Post date:** [November 29, 2020, 4:08pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/3 "2020-11-29T16:08:22Z")
Hi @Drbohlav, thanks alot for the reply and i have gone though the class but sorry didnt find the solution. Please let me know if you find any. > [@Corridor.Baselines node fails while importing corridor having featureline as baseline](https://forum.dynamobim.com/t/corridor-baselines-node-fails-while-importing-corridor-having-featureline-as-baseline/57730/5): > > Known limitation in Civil 3D API Actually its a limitation of dynamo that it cant get corridor baseline if its created using featureline. That being know what i did is tried creating a dynamic featureline/ without dynamic link also but could not get the polycurve of corridor featureline even if its link is broken with corridor. At the same time i was able to get the geometry of featureline created from polyline. Currently i can think of only one solution, explode the featureline and get a 3D polyline out of it. then we can get polycurve of 3D polyline i guess. ---
**Author:** ![Paolo\_Emilio\_Serra1](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/paolo_emilio_serra1/32/12902_2.png) [@Paolo\_Emilio\_Serra1](https://forum.dynamobim.com/u/Paolo_Emilio_Serra1)\ **Post date:** [November 30, 2020, 8:10am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/4 "2020-11-30T08:10:04Z")
Correct @shahid.shaikh_C3D, I meant that there is no Civil 3D API that catches the Alignment Id when the baseline is derived from a feature line, which is necessary to create the Baseline object for the Dynamo Feature Lines. Coming in the new Civil 3D Toolkit ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/3/0/3020d89e94b0f5b2808820860b620ba929e3e11c.png) ---
**Author:** ![shahid.shaikh\_C3D](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@shahid.shaikh\_C3D](https://forum.dynamobim.com/u/shahid.shaikh_C3D)\ **Post date:** [November 30, 2020, 8:20am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/5 "2020-11-30T08:20:25Z")
Thanks alot Paolo…Toolkit always have solutions, i really appreciate all your work and efforts. Thanks again. ---
**Author:** ![genossealex](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@genossealex](https://forum.dynamobim.com/u/genossealex)\ **Post date:** [October 11, 2021, 12:39pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/6 "2021-10-11T12:39:21Z")
Hi @Paolo_Emilio_Serra1. I only get the featurelines from the corridors which are created with an allignment. Do you know where i maybe have made something wrong? ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/2/1/21d4d3e43e5aec88781f2bfb4358d74f368770b2.png) ---
**Author:** ![mzjensen](https://avatars.discourse-cdn.com/v4/letter/m/b77776/32.png) [@mzjensen](https://forum.dynamobim.com/u/mzjensen)\ **Post date:** [October 11, 2021, 12:58pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/7 "2021-10-11T12:58:23Z")
Corridors with Feature Lines as baselines are not supported in Dynamo. ---
**Author:** ![genossealex](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@genossealex](https://forum.dynamobim.com/u/genossealex)\ **Post date:** [October 11, 2021, 1:02pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/8 "2021-10-11T13:02:28Z")
But Paolo posted a screenshot 2 posts before mine. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/6/c/6c928f3c313e329a9e20480ab9c964db0618ec04.png) ---
**Author:** ![Paolo\_Emilio\_Serra1](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/paolo_emilio_serra1/32/12902_2.png) [@Paolo\_Emilio\_Serra1](https://forum.dynamobim.com/u/Paolo_Emilio_Serra1)\ **Post date:** [October 11, 2021, 4:38pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/9 "2021-10-11T16:38:50Z")
@genossealex can you please attach the Civil 3D Toolkit log file? ---
**Author:** ![genossealex](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@genossealex](https://forum.dynamobim.com/u/genossealex)\ **Post date:** [October 12, 2021, 8:01am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/10 "2021-10-12T08:01:42Z")
@Paolo_Emilio_Serra1 here is the log file. [Autodesk\_Civil3DToolkit.txt](https://forum.dynamobim.com/uploads/short-url/lECMmxyjSRgCTtWPrkKgZaGpcKY.txt) (1.1 KB) ---
**Author:** ![genossealex](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@genossealex](https://forum.dynamobim.com/u/genossealex)\ **Post date:** [October 18, 2021, 7:40am UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/11 "2021-10-18T07:40:51Z")
@Paolo_Emilio_Serra1 could you find the problem? ---
**Author:** ![AlexFigueres](https://avatars.discourse-cdn.com/v4/letter/a/b19c9b/32.png) [@AlexFigueres](https://forum.dynamobim.com/u/AlexFigueres)\ **Post date:** [March 17, 2022, 2:06pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/12 "2022-03-17T14:06:24Z")
Hi! Did you get any feedback on this topic? I am having the same issue here now 🙂 ---
**Author:** ![genossealex](https://avatars.discourse-cdn.com/v4/letter/g/97f17d/32.png) [@genossealex](https://forum.dynamobim.com/u/genossealex)\ **Post date:** [March 24, 2022, 4:04pm UTC](https://forum.dynamobim.com/t/polycurve-from-corridor-featureline/57797/13 "2022-03-24T16:04:02Z")
Hi. I have not received any feedback. One of our programmers is trying to export the featurelines with Python and API’s.