Undoing actions in Substation does NOT behave as expected. We are told by Bentley Substation Support that the Undo is a MicroStation command and the Undo is not supported in Substation since more operations can be hidden (like e.g. a database action) and the undo command does not see (all) the executed Substation command (eventually "under the hood").
We do need and urge Bentley to make an UNDO / REDO function quickly availlable in OUS.
Thanks
Nicolas Tobbackx - Elia