Translations:Frequently asked questions/71/en

If you extrude something and the result is not a solid, then the something was not a face. If you have lines and you want to extrude a solid from them, you must first select lines that form a closed perimeter (select several objects by pressing ), join them into a wire (Draft Upgrade tool), then make a face from that wire ( Draft Upgrade tool again). There you are, if all went well you can now extrude it to a solid.