If you installed Fabrication CADmep, it is important to understand that it is possible to run AutoCAD without running Fabrication CADmep. If you installed Fabrication CADmep after installing AutoCAD, the Fabrication CADmep installation creates a desktop shortcut icon that automatically loads the Fabrication CADmep .arx file whenever Fabrication CADmep is launched from that shortcut. If you launch AutoCAD on its own, then you must use the APPLOAD command to load the Fabrication CADmep .arx file, and thereby launch Fabrication CADmep.
To load the Fabrication CADmep .arx file in AutoCAD:
4. Click Load.