The TRUNCNBR keyword specifies if the truncated value is moved to the result field or if an error is generated when numeric overflow occurs while running the object.
If *YES is specified, numeric overflow is ignored and the truncated value is moved to the result field.
If *NO is specified, a run-time error is generated when numeric overflow is detected.
If the TRUNCNBR keyword is not specified, then the value specified on the command is used.