Diagnosis
The process instruction is of type "process data request".
The following value assignment types and others have been defined toassign values to the requested message characteristic in this processinstruction:

• manual value assignment in the PI sheet

(see, for example, characteristic PPPI_REQUESTED_VALUE)

• value assignment in the background using a variable

(see characteristics PPPI_DEFAULT_VARIABLE and PPPI_EXTERNAL_VALUE)
However, you cannot use both value assignment types in one processinstruction.

Procedure
Use only one value assignment type in the process instruction.