Does the operator close CELL.SRC after BCO? Because leaving it open, it is stopped and the "R" in "SIR" is red, not green when mode is changed from T1 to EXT.
"R" can be green only if CELL.SRC is running, not stopped. Is there a special way to run CELL.SRC?
And from reading your notes "SIR" all need to be green??