How are you Mattias Eriksson, Thank you for answer. I have realized what is wrong. The Logical block "SDivide" version miscellaneous Grasshopper. Aging version worker. New version (060055-060059) does not work
It's really hard to see _exactly_ what the problem would be since you do not show your whole code, but it does not lie in the picture you linked above. That would in deed divide the surface into four tiles.
I'm guessing your triangular panel code is mismatched with the datatree of the SubSurf and only uses the first element in the list. Please do link the whole definition - or at least the part that make the triangle.
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