1380 DE = PEEK(222): IF DE = 6 OR DE = 7 THEN POKE 34,0: HOME : VTAB 22: PRINT "FILE NOT FOUND...ORBIT AND": PRINT "TRACE.SAVER MUST BE ON THIS DISK": END
1390 IF DE = 8 THEN POKE 34,15: HOME : VTAB 22: PRINT "I/O ERROR...CHECK DISK DRIVE.": PRINT "AND PRESS RETURN TO CONTINUE": GOSUB 1960: GOTO 300
1400 IF DE = 133 THEN POKE 34,14: TEXT : HOME : VTAB 22: PRINT "ERROR...CHECK MASS VALUES AND MAKE SURE": PRINT "THEY HAVE DIFFERENT STARTING POINTS": PRINT "PRESS RETURN TO CONTINUE";: GOSUB 1960: HOME : GOTO 420
1410 IF DE < >53 THEN TEXT : HOME : VTAB 22: PRINT "UNEXPECTED ERROR #"DE" AT LINE " PEEK(218) +256 * PEEK(219): END