How To Fix TN859 - No consistent backup exists for this queue

SAP Error Message - Details

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 859

• Message text: No consistent backup exists for this queue

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 TN859 - No consistent backup exists for this queue ?

  The SAP error message TN859 "No consistent backup exists for this queue" typically occurs in the context of SAP's message queuing system, particularly when dealing with the Transactional RFC (tRFC) or Queued RFC (qRFC) mechanisms. This error indicates that the system is unable to find a consistent backup for a queue that is required for processing messages.
  Cause:
  
  Queue Inconsistency: The error usually arises when there is an inconsistency in the queue data. This can happen if messages were not processed correctly or if there was a failure during message processing.
  Backup Issues: The system may not have a valid backup of the queue, which is necessary for recovery or processing of messages.
  System Failures: Unexpected system shutdowns, crashes, or network issues can lead to incomplete message processing and result in this error.
  Configuration Issues: Incorrect configuration of the qRFC or tRFC settings can also lead to this error.
  
  Solution:
  
  Check Queue Status: Use transaction codes like SMQ1 (for outbound queues) and SMQ2 (for inbound queues) to check the status of the queues. Look for any stuck or inconsistent messages.
  Reprocess Messages: If you find messages that are stuck, you can try to reprocess them. In SMQ1 or SMQ2, you can select the messages and choose to reprocess them.
  Delete Inconsistent Entries: If there are entries that are causing issues and cannot be processed, you may need to delete them. Be cautious with this approach, as it may lead to data loss.
  Check for System Errors: Review system logs (transaction SM21) for any errors or warnings that might provide more context about the issue.
  Backup and Restore: If you have a backup of the queue data, consider restoring it to a consistent state.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SMQ1, SMQ2, SM21, and SLG1 for logging and monitoring.
  SAP Documentation: Review SAP documentation related to qRFC and tRFC for a deeper understanding of how these mechanisms work and how to manage them.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further assistance.