In short, without autocad pm16.dll , the project management and property calculation features of AutoCAD Architecture will not function, and in many cases, the software will refuse to launch entirely.
The "pm" in the filename often refers to or Performance Management . In older iterations of AutoCAD (particularly the R14 through 2004 eras), this file was critical for: autocad pm16.dll
If the error persists after repairing dependencies, the initial installation may be corrupted. In short, without autocad pm16