Prefix \ not working for DWG key-ins.Prefix \ not working for DWG key-ins while in DGN files.acad.pgp key-ins are not recognized when using the prefix \
The DWG command Prefix only works while in DWG files by default.To use the command prefix in a DGN file, add the MDL application dwgsettings.ma to the MS_DGNAPPS configuration variable.For information on loading MDL applications automatically, refer to:Loading MDL Applications Automatically
Using AutoCAD Commands
AutoCAD PGP Files
Supported AutoCAD Keyins