SAP Message C0564 - Maintain process instruction no. & for phase &

Diagnosis The status of the PI sheet cannot be set to "complete" as the processinstruction &V1& for phase &V2& has not yet been processed. This meansthat either a requested value has not been maintained or a formularesult has not yet been calculated. Procedure RESET N1 Determine the process instruction &V1& for phase &V2& using the functionCurrent position Maintain or calculate the missing value. Then select the function PI sheet -> Set to complete again.