Programmer's Reference Manual Intermec Fingerprint® v8.70.0 ...

ON ERROR GOTO
Chapter —Program Instructions
Purpose Statement for branching to an error-handling subroutine when an error
occurs.
Syntax ON ↔ ERROR ↔ GOTO|
is the number or label of the line to which the program should
branch when an error condition occurs.
Remarks If any kind of error condition occurs after this statement has been encountered,
the standard error-trapping routine will be ignored and the program
will branch to the specified line, which should be the first line in an errorhandling
subroutine.
If the line number is 0, the standard error-trapping routine will be enabled
and no error-branching within the current program will be executed.
Examples If you try to run this example with the printhead raised (or if any other
error occurs), a warning signal will sound and the error LED will be
lighted.
10 LED 0 ON:LED 1 OFF
20 ON ERROR GOTO 1000
30 FONT "Swiss 721 BT"
40 PRTXT "HELLO"
50 PRINTFEED
60 END
. . . . .
1000 LED 0 OFF:LED 1 ON
1010 FOR A%=1 TO 3
1020 SOUND 440,50
1030 SOUND 359,50
1040 NEXT A%
1050 RESUME NEXT
The same example written without line numbers would look like this:
IMMEDIATE OFF
LED 0 ON:LED 1 OFF
ON ERROR GOTO QQQ
FONT "Swiss 721 BT"
PRTXT "HELLO"
PRINTFEED
END
. . . . .
QQQ: LED 0 OFF:LED 1 ON
FOR A%=1 TO 3
SOUND 440,50
SOUND 359,50
NEXT A%
RESUME NEXT
IMMEDIATE ON
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