good morning everyone
i know that the solution to my problem could probably be amateurish but i’m going crazy to make a simple sort by function work
i’m trying to sort walls according to their structural material
but (GB, BH, LP). i also tried with the width parameter (Dxxx in the type name)
i can’t figure out where the error is.
thanks a lot for the help
Just use the “List.GroupByFunction” node instead of “List.SortByFunction” 
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Great! it works! thank you very much!
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