10010 TEXT : HOME : PRINT CHR$(4)"CLOSE": PRINT "An ERROR has occurred in this program.": PRINT
10100 IF ERR% < >6 THEN 10200
10110 PRINT "The next program to be executed was not": PRINT "found on the diskette in the drive.": GOTO 10220
10200 IF ERR% < >8 THEN 10900
10210 PRINT "There appears to be a problem with the": PRINT "diskette in the disk drive."
10220 PRINT : PRINT "Make sure you have the correct diskette": PRINT "(Your Tour of the Apple II) in the disk": PRINT "drive.": GOTO 11000
10900 PRINT "The error does not seem to be one that": PRINT "this program knows about. Please note": PRINT "the error number and line number listed": PRINT "below and report it to your dealer."
10910 PRINT : PRINT "Error Number = "ERR%: PRINT "Line number = "LINE%
10920 PRINT : PRINT "Please put another program diskette in": PRINT "the disk drive. When you have done": PRINT "this press RETURN to continue."