1. ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
  2. ZBI Commands
  3. ON ERROR
  • ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
ON ERROR

ON ERROR

The
ON ERROR
 command can be used to prevent a program from halting in the event of an error. If an error occurs in a previous line during program execution, the
ON ERROR
 statement calls the
GOTO
 or
GOSUB
statement and allows the program to continue.
Format
ON ERROR GOTO <A>
ON ERROR GOSUB <A>
Parameters
<A>
 = the destination location in the program should an error be triggered on the previous line.
Example
This is an example of how to use the ON ERROR command:
30 LET A = B/C 
40 ON ERROR GOTO 100 
... 
100 PRINT "DIVIDE BY ZERO OCCURRED" 
110 LET A = 0 
120 GOTO 50 
...
Comments
If there is no error, this line is ignored.
This is a program command that is preceded by a line number.