"Solid Difference" no response <grasshopper>

Hello everyone ,
I currently want to subtract two objects.
But nothing happens, can you help me see what went wrong?
thank you.

Solid Difference 1|690x274 Solid Difference1.gh (196.0 KB) .

What are you trying to do specifically? Is it to remove the main material where the rim overlaps it, or remove the rim where the main overlaps it?

Hello Dickieloch,

I want to subtract the back object from the front object in the photo

What plugin is giving you the ‘curve middle’ component in your Grasshopper script? I can’t replicate your process because I don’t have that plugin installed.

Hi Dickielpch

No special plugins, all owned by rhino 6