The UCount value is not valid for this amount of points

[Joseph_Oster]

We answered this same question just yesterday:

UCount value is not valid for this amount of points

This is a very common issue. I have the expression for U as x+1. I don’t have a plugin you are using so can’t test it but U Count for Surface From Points is typically one more than what was used on Divide Surface. Here is a working example: