How To Fix C$135 - Could not lock table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: C$ -

• Message number: 135

• Message text: Could not lock table &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message C$135 - Could not lock table &1 ?

  The SAP error message C$135, which states "Could not lock table &1," typically occurs when a process attempts to access a database table that is already locked by another process. This can happen in various scenarios, such as during data updates, batch jobs, or when multiple users are trying to access the same data simultaneously.
  Causes:
  
  Concurrent Access: Multiple users or processes are trying to access or modify the same table at the same time.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the table longer than expected.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks, causing a deadlock.
  Database Configuration: Certain database settings or configurations may lead to locking issues.
  Unfinished Transactions: If a previous transaction did not complete properly, it may leave a lock on the table.
  
  Solutions:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  Identify Locking Process: Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock. You can then decide whether to wait for it to finish or take action.
  Terminate Long-Running Transactions: If a transaction is taking too long, you may need to investigate and possibly terminate it using transaction SM66 (for global overview) or SM50 (for local overview).
  Check for Deadlocks: Analyze the system for deadlocks and resolve them by terminating one of the processes involved.
  Optimize Transactions: Review and optimize the code or processes that are causing long locks. This may involve breaking down large transactions into smaller ones.
  Database Configuration: Consult with your database administrator to review and adjust database settings that may be contributing to locking issues.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM50: Monitor processes on the application server.
  SM66: Monitor processes across all application servers.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking problems.
  Performance Monitoring: Regularly monitor system performance and locking behavior to proactively address potential issues.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.