We can catch any type of exception in the RPG program by using MONITOR opcode, it is like the MONMSG of CLP. You can put any code between MONITOR and ENDMON opcodes, so that whatever error occurred in this range will be monitored. See the example below:
Declare an array like Arr with DIM(2)
Declare 3 variables A, B and C with length 2,0. The below code shows how to monitor the runtime errors. The initial value of A and C is 0, initiate value of B is 11.
MONITOR B DIV A Arr(B) Dsply ON-ERROR 0102 'Div by 0' Dsply ON-ERROR 0121 'Index Err' Dsply ON-ERROR 'Error' Dsply ENDMON
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This was first published in January 2003