When you run the command without any arguments, it will give you the syntax for the command. usage stfcomregister -stfregserver/-stfunregserver stfcomregister -stfregserver c:\msk\out\Bentley\ you'll need to pass the path to the bentley dir and -stfregserver To be safe, use the short path for ustation.exe. To determine the shortpath, pleas use the dir command with the /x switch [c:\program files\bentley-08.11.01.23-wip]dir /x /s /b ustation.exe C:\PROGRA~1\BENTLE~1.23-\MICROS~1\ustation.exe Therefore the command line will be stfcomregister -stfregserver C:\PROGRA~1\BENTLE~1.23-\ TriForma's COM API requires similar registration tfcomregister -tfregserver C:\PROGRA~1\BENTLE~1.23-\
Tfcom Register Example
Keys Registered By Tfcom
Keys Registered By Stfcom