Working Reference Coordinate System

So! I found that you cannot set the toolbar reference Coordinate System to type Working from maxscript, although the listener writes out that the working ref coord system command mode is #PIVOT, but if I try to use it, it doesn't work at all.

So if you write this command to the editor:

toolMode.coordsys #pivot

And execute it,

It says: -- Runtime error: Illegal coordsys mode type: #pivot

So is there any other way to change the reference coordinate system mode to working ref coord system in maxscript?