Identifying PFK definition errors

When the system tries to execute an invalid CONTROL N,PFK command, the audible alarm sounds, and the command appears in the entry area. The location of the cursor indicates the error:

• If the cursor is positioned under the first letter of a keyword (CMD, KEY, PFK, or CON), that keyword or its trailing equal sign is incorrect.
• If the cursor is positioned under the number of the PFK being defined, that number is either not a numeric character or not the number of a PFK that was designated for command entry in the PFK table, or it is the number of a PFK you are trying to associate with a list of key numbers when it is already part of a list of key numbers.
• If the cursor is positioned under a number following the KEY operand, the key number indicated is either a non-numeric character, the number of the PFK that is being defined, the number of a PFK that has already been defined as a list of key numbers, or the number of a PFK that has no command associated with it in a PFK table.