A return code from the usage exit indicates how processing is to continue for the current SMF type 89 record. The exit can choose to:

1. Instruct the usage report program to process the current record
2. Instruct the usage report program to ignore the current record
3. Instruct the usage report program to stop calling the exit
4. Instruct the usage report program to process the current record and call the usage exit again with the same record.