# TSpline node error **URL:** \ **Category:** Revit\ **Created:** [November 12, 2018, 2:13pm UTC](https://forum.dynamobim.com/t/tspline-node-error/28347 "2018-11-12T14:13:38Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![fatime6L9RQ](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/fatime6l9rq/32/60031_2.png) [@fatime6L9RQ](https://forum.dynamobim.com/u/fatime6L9RQ)\ **Post date:** [November 12, 2018, 2:13pm UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/1 "2018-11-12T14:13:38Z")
ı activate t spline mode but ıt isnt solid geometry how can ı fix thanks a lot ![not%20solid](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/e/7/e788a9290d96e0cc7f67b951320315720fe9d8e6.jpeg) ---
**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:** [November 12, 2018, 7:14pm UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/2 "2018-11-12T19:14:54Z")
What does the error say? ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [November 12, 2018, 7:59pm UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/3 "2018-11-12T19:59:45Z")
@fatime6L9RQ Good to see that you don’t give up. 🙂 ---
**Author:** ![fatime6L9RQ](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/fatime6l9rq/32/60031_2.png) [@fatime6L9RQ](https://forum.dynamobim.com/u/fatime6L9RQ)\ **Post date:** [November 13, 2018, 7:48am UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/4 "2018-11-13T07:48:43Z")
hi first warning Warning: TSplineSurface.BuildFromLines operation failed. Ouptut t-spline has empty topology second warning Warning: TSplineSurface.BuildFromLines operation failed. Ouptut t-spline has empty topology ---
**Author:** ![fatime6L9RQ](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/fatime6l9rq/32/60031_2.png) [@fatime6L9RQ](https://forum.dynamobim.com/u/fatime6L9RQ)\ **Post date:** [November 13, 2018, 7:52am UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/5 "2018-11-13T07:52:28Z")
ı dont know a lot of thing about dynamo right now but ı keen on thanks for support ---
**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:** [November 13, 2018, 9:41am UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/6 "2018-11-13T09:41:25Z")
@fatime6L9RQ In order to use TSplineSurface.BuildFromLines lines must be closed (like Pyramid). In your case try using the other node called TSplineSurface.BuildPipes. See my examples below: ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/4/d/4d48dc3fad9756a90b3939159e5a5b3b6ad148d5.png) ---
**Author:** ![fatime6L9RQ](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/fatime6l9rq/32/60031_2.png) [@fatime6L9RQ](https://forum.dynamobim.com/u/fatime6L9RQ)\ **Post date:** [November 13, 2018, 11:37am UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/7 "2018-11-13T11:37:53Z")
hi thanks for advice ıt work TSplineSurface.BuildPipes but ı want to create a surface ıt isn t work t spline surface and to set adaptive points actually how should I follow a path should ı try another way this ![buildpipe](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/3/b/3b9f58562074df371241601332ea519cdc49d83a.jpeg) ![adaptive%20version](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/5/d57115e057ce7f02db833d39cf710ced15c32bc5.jpeg) ---
**Author:** ![m.rijsmus](https://avatars.discourse-cdn.com/v4/letter/m/6f9a4e/32.png) [@m.rijsmus](https://forum.dynamobim.com/u/m.rijsmus)\ **Post date:** [November 13, 2018, 1:00pm UTC](https://forum.dynamobim.com/t/tspline-node-error/28347/8 "2018-11-13T13:00:35Z")
@fatime6L9RQ Ckeck this out > **[Paneling with Intent to Fabricate](https://www.autodesk.com/autodesk-university/class/Paneling-Intent-Fabricate-2016)** > > How should a design surface be expressed through panels? How can the architect ensure that a facade-design intent is honored all the way through to fabrication? Learn from Building Information Modeling (BIM)-oriented and computational strategies used...