RevitFace.FromDynamoSurface null value

Am I using the node wrong? Dynamo v2.0.3

We have to see more of your script. That node only works with surfaces originally derived from Revit faces.

It’s for dimensioning walls with a model line as reference, I took it from the explanation of @viktor_kuzev in this post back in 2016: Automatic Dimension Walls

right, don’t have time right now, but could you check if maybe deriving the faces from the topology works better than through polysurfaces? have a look at the script in the link you provided.

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The thing is topology faces node wasn’t working for me, so I used this method.

Try using Element.Faces to get the surfaces

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