Extrude isn't finding the boundary correctly?
In BricsCAD a strange error that happens could be that when trying to extrude a 2D sketch, BricsCAD won't recognise the area of the shape as a boundary meaning you can't extrude
This is a simple fix where you need to run a command called 'SelectionMode' and ensure the value is set to between 4 and 15. (15 being maximum option available)
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