Weird extrusion.3dm (1.7 MB)
Hey!
I’m trying to extrude this curve, which I’ve done before successfully, but now that I’ve closed and reopened rhino it won’t extrude properly. Not sure what’s happening. Any help would be appreciated!
Thanks 
Some of your curves are open. So you either have to join the curves before you extrude them. Or join the extrusions and then run the cap command.
I’m a novice Rhino user, so given the technical skill of your design- I’m not sure this will apply to you. However, if anyone else is struggling with a wireframe extrusion that has a closed loop, on a planar surface, and was created as a solid=yes… check the properties of the solid (the color wheel icon likely located at the right of your screen), than Viewport (camera icon) and review display mode to ensure its not in a wireframe display haha.
then…
Yes that helps 