# Importing 3D CAD Polyline into Revit **URL:** \ **Category:** Geometry\ **Created:** [October 2, 2017, 5:08am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267 "2017-10-02T05:08:01Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Mark](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Mark](https://forum.dynamobim.com/u/Mark)\ **Post date:** [October 2, 2017, 5:08am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/1 "2017-10-02T05:08:01Z")
Hi, I’m trying to import a 3D polyline from CAD into Revit it has a two way curve. I can select the lines and they appear to show in Revit but unable to select or use, is there a way of doing this? I also tried using the Bimorph package but I receive warnings, not sure if it accepts 3D polylines. Warning: CAD.CurvesFromCADLayers operation failed. Method not found: 'Autodesk.Revit.DB.NurbSpline Autodesk.Revit.DB.NurbSpline.Create ![image](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex022/uploads/dynamobim/original/3X/a/3/a3c4bafeaf21e3533f1321f15982e887fd08de4d.jpg) Dynamo ![image](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex022/uploads/dynamobim/original/3X/8/e/8edb8e9fcaa83c2de2946a320d8d0f8ee2e72502.png) Dwg lines trying to import ---
**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\ **Post date:** [October 2, 2017, 5:24am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/2 "2017-10-02T05:24:00Z")
Hi @Mark > [@Mark](#): > > Warning: CAD.CurvesFromCADLayers operation failed. Method not found: 'Autodesk.Revit.DB.NurbSpline Autodesk.Revit.DB.NurbSpline.Create We can’t see any warnings in your graph. What happens when you import instance what does it looks like. ---
**Author:** ![Mark](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Mark](https://forum.dynamobim.com/u/Mark)\ **Post date:** [October 2, 2017, 5:27am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/3 "2017-10-02T05:27:43Z")
Hi Kulkul, Sorry the warning were from a graph I was trying with the Bimorph package but the graph attached works, turns the lines in Revit blue but unable to select or do anything with, is there a node I need to use to bring in the geometry to allow me to select ? Many thanks. ---
**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\ **Post date:** [October 2, 2017, 5:34am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/4 "2017-10-02T05:34:59Z")
Make sure you switch on Generic model Category in your view. ---
**Author:** ![Thomas\_Mahon](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/thomas_mahon/32/64209_2.png) [@Thomas\_Mahon](https://forum.dynamobim.com/u/Thomas_Mahon)\ **Post date:** [October 2, 2017, 6:04am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/5 "2017-10-02T06:04:07Z")
@Mark typically that error in BimorphNodes is caused by changes to the Revit 2018 API. However, this is fixed in BimorphNodes v2.1 which is now compatible with 2018.1, just released! ---
**Author:** ![Mark](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Mark](https://forum.dynamobim.com/u/Mark)\ **Post date:** [October 2, 2017, 10:05pm UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/6 "2017-10-02T22:05:29Z")
Hi Kulkul, I tried importing directly into a Generic model but still the same result. However I did download the latest BimorphNodes and works a treat, thanks Thomas. But when it imports into Revit it breaks the polyline into individual sections, is there a way of joining these curves back to a single line on the output of your node ? Many thanks. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/d/7d79e5cc1977e80f35e5c0f3bc1923f74100a372.png) ---
**Author:** ![Thomas\_Mahon](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/thomas_mahon/32/64209_2.png) [@Thomas\_Mahon](https://forum.dynamobim.com/u/Thomas_Mahon)\ **Post date:** [October 3, 2017, 11:07am UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/7 "2017-10-03T11:07:23Z")
@Mark no problem! It could be caused by limitations in Revit RVT files. If the curve is non-planar, then it will be interpolated instead, resulting in the segments. Have you attempted the conversion within a Mass Family? The Mass environment supports non-planar curves and `CurveFromCADLayers` will utilise the environment within which its run. ---
**Author:** ![DanoDmano](https://avatars.discourse-cdn.com/v4/letter/d/c57346/32.png) [@DanoDmano](https://forum.dynamobim.com/u/DanoDmano)\ **Post date:** [May 13, 2021, 3:46pm UTC](https://forum.dynamobim.com/t/importing-3d-cad-polyline-into-revit/15267/8 "2021-05-13T15:46:08Z")
Does the Generic Model - Adaptive environment have the same compatibility features as Masses?