Morning all,
i just noticed that the CurtainPanel.ByElement node will fail if you feed a Curtain Wall that has Doors or Windows in it. Even if they we’re built as Curtain Panel.
Thank god for Clockwork’s Element.Panels but shouldn’t this be builtin?
Please report this on DynamoRevit github issues page:
I reported this over three years ago. Nothing happened. Hence the Clockwork node. 
Also, be aware that panels reported by both nodes will include what I call phantom panels if your curtain wall contains non-quadrilateral panels (auto-generated when removing grid segments).
The latest Clockwork version has a node called CurtainPanel.IsPhantomPanel for identifying those panels so you can filter them out (useful for element numbering etc.).
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