NET/MASTER Network Control Language (NCL) Programmer's Guide

Writing an Error Handler
Run-Time Error Handling
106160 Tandem Computers Incorporated 7–9
Specifying Alternative Actions Using Different Error Handlers
When you use more than one error handler, you can use each to direct NCL to
perform different actions. The following example shows an NCL procedure that traps
arithmetic errors in the ARITH_ERROR error handler, type errors in the TYPE_ERROR
error handler, and all other errors in the ERROR error handler:
zex0705n: PROCEDURE
/* Specifying more than one error handler */
ON ERROR DO
SAY Unexpected error
CALL generror
FLUSH
END
ON ARITH_ERROR DO
SAY Arithmetic error
CALL generror
FLUSH
END
ON TYPE_ERROR DO
SAY Type error
CALL generror
FLUSH
END
generror: PROCEDURE
/* ERROR handler */
SAY "Condition is "&SYS.ERROR.COND
SAY "Code is "&SYS.ERROR.CODE
SAY "Procedure library is "&SYS.ERROR.LIB
SAY "Proc/Func is "&SYS.ERROR.PROCNAME
end generror
SAY &1" to the power of "&2" is "&1**&2
SAY Normal termination
END zex0705n