How To Fix CCSEQ018 - The usage location table has already been locked, processing cancelled

SAP Error Message - Details

• Message type: E = Error

• Message class: CCSEQ - Change sequence graph

• Message number: 018

• Message text: The usage location table has already been locked, processing cancelled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CCSEQ018 - The usage location table has already been locked, processing cancelled ?

  The SAP error message CCSEQ018 indicates that the usage location table has already been locked, which prevents further processing. This error typically occurs in the context of controlling (CO) or production planning (PP) modules when there is an attempt to access or modify data that is currently being processed or locked by another transaction or user.
  Cause:
  
  Concurrent Access: The most common cause of this error is that another user or process is currently accessing the usage location table, leading to a lock on the data.
  Long-running Transactions: If a transaction takes too long to complete, it may hold a lock on the table longer than expected, causing subsequent transactions to fail with this error.
  System Configuration: Certain configurations or customizations in the SAP system may lead to unexpected locking behavior.
  
  Solution:
  
  Wait and Retry: If the error is due to concurrent access, waiting for a short period and then retrying the operation may resolve the issue.
  Identify Locking User/Process:
  
  Use transaction code SM12 to check for existing locks. You can see which user or process is holding the lock on the usage location table.
  If you identify a user or process that is holding the lock unnecessarily, you may need to communicate with them to resolve the issue.
  
  
  Terminate Long-running Transactions: If a transaction is taking too long and holding the lock, you may need to terminate it using transaction code SM50 or SM66 (for system-wide monitoring).
  Check for Background Jobs: Sometimes, background jobs may be locking the table. Use transaction code SM37 to check for any background jobs that might be causing the lock.
  Review Custom Code: If there are custom programs or enhancements that interact with the usage location table, review them for potential locking issues.
  System Configuration Review: If the issue persists, consider reviewing the system configuration or consulting with your SAP Basis team to ensure that there are no underlying issues causing excessive locking.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM50: Monitor processes on the application server.
  SM66: Monitor processes across the entire system.
  SM37: Monitor background jobs.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to this error message.
  Documentation: Review SAP documentation for best practices on managing locks and concurrent processing.
  
  If the problem persists after trying the above solutions, it may be beneficial to involve your SAP Basis team or SAP support for further investigation.