I looked at your file It's perfect.
The error when instantiating probably comes from the fact that you are active on the geometric set.
Not on a part body.
Even in hybrid mode you can't insert a part part in a geometric set.
I looked at your file It's perfect.
The error when instantiating probably comes from the fact that you are active on the geometric set.
Not on a part body.
Even in hybrid mode you can't insert a part part in a geometric set.