ISOTRIM PROBLEM

Dear, grasshopper family.

1.I am so stressed of this isotrim problem.

I wanna make the surface panelized however, I have failed. When I input surface to 'divide domain' and 'isotrim', grasshopper calculate it for very long time and fails to make isotrim.

I don't know what I have done wrong and missed.

2. Usually, when I input data, I use 'mm' unit. So I usually type 4200 into input. is the big number related to making grasshopper slow?. specially, when I use extrude or loft, grasshopper become significantly slow.

Please give me an advice.

thanks.