How To Fix TN871 - Backup for package &1 is blocked by package &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 871

• Message text: Backup for package &1 is blocked by package &2

What causes this issue?

A backup was created for a transport-based correction instruction for
SAP Notes &V1&. This backup cannot be restored because an additional
transport-based correction instruction for SAP Notes &V2& has been
implemented in the meantime.

System Response

It is currently not possible to restore the backup.

How to fix this error?

First, restore the backup of the transport-based correction instruction
for SAP Notes &V2&. Then restore the backup of the transport-based
correction instruction for SAP Notes &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TN871 - Backup for package &1 is blocked by package &2 ?

  The SAP error message TN871 indicates that a backup operation for a transport package (package &1) is blocked because another transport package (package &2) is currently being processed. This situation typically arises in the context of the SAP Transport Management System (TMS), where multiple transport requests are being handled simultaneously.
  Cause:
  
  Concurrent Processing: The error occurs when two transport requests are trying to access the same transport directory or are in a state that prevents one from proceeding while the other is still being processed.
  Locking Mechanism: SAP uses a locking mechanism to ensure data integrity during transport operations. If one package is being processed, it locks certain resources, preventing other packages from being backed up or processed until the lock is released.
  
  Solution:
  
  Check Transport Status: Use transaction code SE09 or SE10 to check the status of the transport requests. Identify which package (package &2) is currently being processed and causing the blockage.
  Wait for Completion: If the blocking package is still in process, you may need to wait for it to complete. Once it finishes, the backup for the other package (package &1) should proceed without issues.
  Release Locks: If you determine that the blocking package is stuck or has failed, you may need to manually release the lock. This can be done by:
  
  Using transaction SM12 to check for and delete any locks related to the transport requests.
  Ensure that you have the necessary authorizations to perform this action.
  
  
  Transport Management: Review your transport management practices to avoid concurrent processing of packages that may lead to such conflicts. Consider scheduling transports during off-peak hours or implementing a more structured transport strategy.
  Consult SAP Notes: If the issue persists, check for any relevant SAP Notes that may provide additional guidance or patches related to transport management and locking issues.
  
  Related Information:
  
  Transaction Codes:
  
  SE09 / SE10: Transport Organizer
  SM12: Display and Delete Locks
  ST22: Dump Analysis (to check for any related dumps)
  
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on transport management and error handling.
  Transport Management System (TMS): Familiarize yourself with TMS configuration and best practices to minimize transport-related issues.
  
  By following these steps, you should be able to resolve the TN871 error and ensure smoother transport operations in your SAP environment.