How To Fix Q2308 - Could not lock planning table SDBAP - Only display possible

SAP Error Message - Details

• Message type: E = Error

• Message class: Q2 - Messages for Development Classes SDBO and SDBA

• Message number: 308

• Message text: Could not lock planning table SDBAP - Only display possible

What causes this issue?

Another user is probably using transaction DB13. Only one user can
maintain DBA scheduling at any one time.

System Response

System calls transaction DB13 in display mode.

How to fix this error?

If you want to maintain DBA actions, wait until the transaction is
available again.

Procedure for System Administrators

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message Q2308 - Could not lock planning table SDBAP - Only display possible ?

  The SAP error message Q2308, which states "Could not lock planning table SDBAP - Only display possible," typically occurs in the context of SAP's Advanced Planning and Optimization (APO) module or similar planning applications. This error indicates that the system is unable to obtain a lock on the planning table (SDBAP) due to another process or user currently holding the lock. As a result, the system can only allow display access, preventing any modifications or updates to the planning data.
  Causes:
  
  Concurrent Access: Another user or process is currently accessing the planning table, which prevents your session from obtaining a lock.
  Long-Running Transactions: A transaction that takes a long time to complete may hold the lock for an extended period.
  System Configuration: Configuration settings related to locking mechanisms may not be optimal.
  Deadlocks: In some cases, a deadlock situation may occur where two processes are waiting for each other to release locks.
  
  Solutions:
  
  Wait and Retry: If the lock is held by another user or process, waiting for a short period and then retrying the operation may resolve the issue.
  Identify Lock Holders: Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock on the SDBAP table. You can then communicate with the user or investigate the process.
  Terminate Long-Running Processes: If a process is holding the lock for too long and is not responding, you may need to terminate it using transaction SM37 (for job monitoring) or SM50 (for process overview).
  Check Configuration: Review the configuration settings related to locking in your SAP system to ensure they are set up correctly.
  System Performance: If this issue occurs frequently, consider reviewing system performance and optimizing long-running transactions to reduce lock contention.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12, SM37, and SM50 for monitoring locks and processes.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP's support portal can provide additional insights and solutions.
  Documentation: Review SAP documentation related to APO and planning table management for best practices and troubleshooting steps.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.