HAH HAH HAH
The answer will cost you a meeeelllioooon dollars
This was my introduction to Heidenhain controls [15 years ago]
Nowhere in the TNC 145 Manual does it mention the following:
although a line may be highlighted, implying that you are on that line, you are not. In order to be on the line, you must hit the'GOTO' key, and the line number, then ENTER[TNC 151 and later] the 145 you enter the number first then hit GOTO.
I'll tell you where to send the check