Message type: E = Error
Message class:  NAA - Subsequent settlement (Purchasing) 
Message number: 394
Message text: The price determination date (Settlement Management document) is missing
The price determination data (Settlement Management document price
determination) is missing.
The update cannot be carried out.
Contact your system administrator.
An internal error probably occurred. Contact SAP.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message NAA394, which states "The price determination date (Settlement Management document) is missing," typically occurs in the context of settlement management processes, particularly when dealing with settlement documents in SAP. This error indicates that the system is unable to determine the price determination date, which is essential for calculating prices and settlements accurately.
Cause: Missing Data: The price determination date is not populated in the relevant settlement management document. This can happen if the document was not created correctly or if there was an issue during the data entry process.
Configuration Issues: There may be configuration settings in the SAP system that are not set up correctly, leading to the absence of the price determination date. Incomplete Document: The settlement document may be incomplete or not fully processed, which can prevent the system from determining the necessary date. Custom Development: If there are custom developments or enhancements in the system, they might
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