The dual terminal debugging feature seems to have stopped working correctly. I am on Windows 11 running Unidata 8.2.3.

I used to use this feature heavily when debugging character base screens. Without duel terminal, that task is very difficult.

When a debug is encountered, the cmd line program first shows "!" as it should but entry of any valid debug command returns:

***Illegal debugger command. Try 'H' for HELP