SAP Message C0221 - - Assign PPPI_MESSAGE_CATEGORY only once (simple data request)

Diagnosis
The process instruction is of type "process data request".
Characteristic PPPI_DATA_REQUEST_TYPE specifies that it is a simpledata request. This means that you can request exactly one message ofonly one message category.
However, characteristic PPPI_MESSAGE_CATEGORY requesting therequired message category has been assigned to the processinstruction more than once.

Procedure
RESET N1
Check whether you need a simple data request, that is, a single message,or a repeated data request, that is, several messages of differentmessage categories.
If necessary, correct the data request type by changing the value ofcharacteristic PPPI_DATA_REQUEST_TYPE.
If you want to create a simple data request, delete all assignments ofcharacteristic PPPI_MESSAGE_CATEGORY except for one.