Newbie need help with contour from a mesh to laser it

Here is my simple program. It work to put the contour on the xy plane but they all stack and open nest won’t work

hi aagc
share your file to check it out (9.1 KB)

Need to Internalize it.

This is written “Geo as List”, you provide a datatree so you “say” to OpenNest, nest the first geometry alone then the second alone …
So just flatten the output or input. Right click on “Geo” and click “Flatten”
This is a classical !!!