in 2009, a license update of libdwg/libredwg to the version 3 of the gnu gpl, made it impossible for the free software projects librecad and freecad to use libredwg legally. many projects voiced their unhappiness about the gplv3 license selection for libredwg, such as freecad, librecad, assimp, and blender. some suggested the selection of a license with a broader license compatibility, for instance the mit, bsd, or lgpl 2.1. a request went to the fsf to relicense gnu libredwg as gplv2, which was rejected in 2012.