In the US version, the RoofMaker Library 13 is in the Object Library 13.lcf library, so check to see if the Object Library 13 (which is in the ArchiCAD Library 13 folder in the ArchiCAD 13 folder) is one of your loaded libraries. RoofMaker needs these objects to work.
David
David Maudlin / Architect www.davidmaudlin.com Digital Architecture AC27 USA • iMac 27" 4.0GHz Quad-core i7 OSX11 | 24 gb ram • MacBook Pro M3 Pro | 36 gb ram OSX14