How To Fix PSSC_BUFFER021 - Cannot assign unique SEQNR for '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: PSSC_BUFFER - Social Services Buffer

• Message number: 021

• Message text: Cannot assign unique SEQNR for '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message PSSC_BUFFER021 - Cannot assign unique SEQNR for '&1' ?

  The SAP error message PSSC_BUFFER021 indicates that the system is unable to assign a unique sequence number (SEQNR) for a specific object or record, denoted by &1. This error typically occurs in the context of SAP applications that manage data buffers, particularly in scenarios involving data consistency and integrity.
  Causes:
  
  Duplicate Sequence Numbers: The most common cause is that the system is trying to assign a sequence number that already exists in the database or buffer, leading to a conflict.
  Buffer Issues: There may be issues with the data buffer itself, such as corruption or misconfiguration.
  Concurrency Issues: Multiple processes or transactions may be trying to assign the same sequence number simultaneously, leading to a race condition.
  Configuration Errors: Incorrect configuration settings in the relevant SAP modules or applications can also lead to this error.
  
  Solutions:
  
  Check for Duplicates: Investigate the database or buffer to identify if the sequence number already exists. If it does, you may need to adjust the logic that generates these numbers to ensure uniqueness.
  Clear Buffer: If the issue is related to buffer corruption, consider clearing the relevant buffer. This can often be done through transaction codes like SM12 (for lock entries) or SM21 (for system logs) to identify and resolve issues.
  Review Configuration: Check the configuration settings for the relevant SAP module to ensure that they are set up correctly. This may involve reviewing settings in transaction codes like SPRO.
  Implement Error Handling: If the error is due to concurrency, consider implementing error handling or retry logic in your application to manage conflicts more gracefully.
  Consult SAP Notes: Look for relevant SAP Notes or Knowledge Base Articles (KBAs) that may address this specific error. SAP frequently updates its documentation and provides solutions for known issues.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including the context in which it occurs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE37 (Function Modules), and SE80 (Object Navigator) to investigate the underlying data structures and logic.
  System Logs: Check system logs for additional error messages or warnings that may provide more context about the issue.
  Performance Monitoring: Monitor system performance and resource usage, as high load or resource contention can exacerbate issues related to sequence number assignment.
  
  By following these steps, you should be able to diagnose and resolve the PSSC_BUFFER021 error in your SAP environment.