IBM TN5250 manual Appendix A, Remote Control Unit Functions Reference Manual for further

A-4	Appendix A
	Status errors and their descriptions are listed in Table A-4. Refer to the IBM
	5394 Remote Control Unit Functions Reference Manual for further
	information.
Table A-4 Status Line Errors
Error		Description
0000	Help key not allowed	Either no system reference code appears, or the
		application does not support the key you pressed.
0001	Last keystroke not recognized	The terminal cannot keep up with the rate of
		information entered. As a result, the last character
		entered is not recognized.
0002	Last keystroke not recognized	The terminal received an invalid key code from the
		keyboard. Either the code is incorrect for the
		keyboard at the terminal, or an error occurred in
		translating the keystroke.
0003	Invalid CMDx or Fx key	You pressed an invalid F or Alt key sequence.
0005	Cursor in protected area of display	The cursor is not in an input field, but in a
		protected area of the display.
0006 Invalid key followed SYS REQ key		You pressed an invalid key after pressing the
		Alt Prtsc key sequence, and before pressing the Ctrl
		(right) or Ctrl (left) keys.
0007	Mandatory enter field, must enter data	There is at least one mandatory entry field on the
		screen that you must enter data into before the
		screen can be changed or processed.
0008	This field requires alphabetic characters	You tried to enter nonalphabetic characters into a
		field designated alphabetic. Valid characters here
		are:
		◆	A through Z.
		◆ Blank ( ), comma (,), period (.), hyphen (-), and
			apostrophe (’).
		◆	(pad) 1 key.
		The (pad) 1 key is used to duplicate these
		characters in the field.