4B44I P OPRATN CHK SYSnnn=cuu TI=**** DC=********** DECB=aaaaaa
Cause: Operation check. The local 3270 control unit cannot execute an order.
Due to invalid operations specified by the control characters and order sequences in the data
System Action: Processing continues.
Programmer Action: Ensure that:
1. If the command is a write, the message length was correctly indicated.
2. All buffer addresses specified in the data stream are correct.
3. On a READ TBP or READ TMP operation that the WCC set in the entry operand data does
not start a print operation.
Operator Action: none.
Used with Courtesy and Permission of International Business Machines, Inc.