We are using Microstation SS3 and Power InRoads SS3 / SS2.
Have not been able to find a list of the _USTN system variables, where is the likely place for such a list?
Take a look at Bentley Configuration explorer that will list all variables used in your configuration.
If you wish to view _USTN variables in the workspace configuration dialog then add the following line to your config so that they will be displayed (they are hidden by default):
_USTN_DISPLAYALLCFGVARS = 1
Answer Verified By: CADTech1