Issue in creating surface from points

for,.gh (19.0 KB)
model.3dm (147.4 KB)
I am using point attractor to create points to make a surface. The issue “1. A point in the grid is null. Fitting operation aborted” is popping up when i am trying to create a surface from points.
attached are the files and screenshot of the script.
Kindly please address the problem.

It’s more of a Grasshopper specific question rather than Ladybug Tools question. It’s better to ask in Grasshopper discourse than here.
Nonetheless, you could use the CleanTree component to remove the null output before building the surface.