Does someone konw why when i create a TinSurface, there is always the issue that there is no pointgroup with the name that i give at the first time, but when i reload the document, it works agagin?

It’s a race condition, after you create the CogoPointGroup extract its name, and pass it to the TinSurface.ByCogoPointGroup node.

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ok, I see…
it seems like that it would be solved by creating 2 dyn. documents, one for CogoPointGroup and one for Tinsurface. But is there a solution that create CogoPointGroup and TinSurface in one dyn. document at the same time ?

I never said you need to do this in two separate DYN!

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