what happened with this?
good job finding that!
because squish needs a 3-D surface or mesh - your object is a polysurface
same story LoL
when your shape is a surface, the python from @djordje works.
Here’s one way to turn it back into an untrimmed surface,
though I still suggest you model it as a surface from the start
squish4_2020.gh (35.2 KB)