I own an old 1987 Citizen L16 that draws an alarm which reads: "No.13, PROG ERROR (NO ADDRESS)", when I depress the Cycle Start (or Auto Start) button. I've worked on a few 1980's "F Series" Citizens in the past, but never an L16. I don't have manuals, but am able move and zero return all axis', MDI spindle on and off, command collet open/close, coolant on/off etc., but once in AUTO mode I draw the alarm. I can also see and change info in the program in EDIT mode, but have not altered any of its existing, original information. I've tried it in home position, coolant on, collet open (and closed), but always with the same result. There are a few existing programs loaded in it, and I have actually seen it run a program while on my shop floor, however the previous owner was the one who got it to run one, and he is no longer available. I know there must be a few of these still out there and would greatly appreciate it if someone could tell me the "exact" sequence and/or series of buttons to depress to run a program, or what physical state the machine and/or memory needs to be in for me to run a program. Thank you all in advance!