Surface.Bypatch Problem (Could not make patch surfaces : API_FAILED )

So i have a issue with surface.patch node… im not sure im using it correctly but it doesn’t seem to be picking up all the poly curves… Any ideas?

And they are closed…

 

Are they self intersecting? What is the error message you are getting?

here is the error …

Surface.ByPatch operation failed.
Could not make patch surfaces : API_FAILED – Operation unsuccessful.

Did anyone find a solution for this issue?

I got that warning when working with PRoject Units Length in Metres. Solved changing units to millimetres