Sounds weird for me whats happening.
Can you provide us your program versions and the packages you are using? (because i don’t know where ‘Frame.ByWidthHeights’ is coming from.
and to even make it easier to check for us, can you attach your revit/dynamo file(so we don’t have to rebuild your graph).
In my opinion it’s maybe goiing wrong because you don’t have any inputs on the ‘Frame.ByWidthHeights’.
i checked my own robot and revit and analytical bar by lines works fine for me. Are you sure that the output of the node is lines?