OpenNest in Grasshopper

Hello

I am trying to nest rectangles onto an irregular shaped sheet with OpenNest but it is not working.

The rectangles and curve/geometry for the irregular shape are both closed. How can I get this done?

Many thanks in advance :)))


I think outline needs to be polyline.

It’s working!

Any idea how to have them align more like the example highlighted? I imagine I have to rebuild the curve so there are more vertices on the shape connected to the Sheet to start?