I am doing some transformation and translation of a few DWGs using FME desktop and I received this error,
AutoCAD proxy entity type 'AcDbZombieEntity' not supported.
Some preliminary research revealed that 'AcDb Zombie Entity' is another term for 'proxy entity' (link) and explains that the Export to AutoCAD command should be used to rid your data of the zombie entities (link). This helps me proceed with my task but does not help me understand the AutoCAD object data model any better.
What exactly is a proxy/zombie entity? How are proxy entities introduced into a file? The creator of the DWG does not know what a proxy entity is or how they inadvertently introduced them into the file.