Message type: E = Error
Message class:  PPC1DM - PP Backflush: Database Management and Communication 
Message number: 522
Message text: No table key for postprocessing header table transferred
The system is attempting to determine the key for the postprocessing
records. To do this, the system requires the number of the production
cost collector.
An internal program error occurs.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message PPC1DM522 ("No table key for postprocessing header table transferred") typically occurs in the context of the SAP Production Planning and Control (PP) module, particularly when dealing with post-processing of data. This error indicates that the system is unable to find a valid key for the postprocessing header table, which is necessary for the operation being performed.
Causes:
Missing Key Data: The most common cause is that the key data required to identify the postprocessing header is missing or not being passed correctly in the transaction or program.
Incorrect Configuration: There may be issues with the configuration of the postprocessing framework or the specific process being executed.
Data Integrity Issues: There could be inconsistencies or corruption in the data that is being processed, leading to the absence of the required key.
Custom Development: If there are custom developments or enhancements in the system, they might not be handling the keys correctly.
Solutions:
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