How To Fix DG886 - Table cannot be locked; conversion is not done

SAP Error Message - Details

• Message type: E = Error

• Message class: DG - DG: Messages for Dangerous Goods Management

• Message number: 886

• Message text: Table cannot be locked; conversion is not done

What causes this issue?

The dangerous goods tables DGTMD and DGTM2 could not be locked as
individual dangerous goods data records are already locked by other
users.

System Response

The conversions are not done.

How to fix this error?

Request all other users to stop work in the dangerous goods master and
execute the program again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DG886 - Table cannot be locked; conversion is not done ?

  The SAP error message DG886, which states "Table cannot be locked; conversion is not done," typically occurs during database operations, particularly when there is an attempt to perform a conversion or modification on a database table that is currently locked by another process. This can happen in various scenarios, such as during data migration, upgrades, or when running certain transactions that require exclusive access to a table.
  Causes:
  
  Table Locking: The table you are trying to access is locked by another transaction or user. This can happen if another process is currently reading from or writing to the table.
  Long-Running Transactions: If a transaction is taking too long to complete, it may hold a lock on the table longer than expected.
  Database Configuration: Certain database configurations or settings may lead to locking issues, especially in high-concurrency environments.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  
  Solutions:
  
  
  Identify and Terminate Blocking Processes:
  
  Use transaction codes like SM12 (to view and delete locks) and SM66 (to monitor global work processes) to identify which user or process is holding the lock.
  If necessary, terminate the blocking process after ensuring it is safe to do so.
  
  
  
  Wait and Retry:
  
  If the lock is temporary, you may simply wait for the other transaction to complete and then retry the operation.
  
  
  
  Optimize Long-Running Transactions:
  
  Review and optimize any long-running transactions that may be causing locks. This may involve breaking down large transactions into smaller ones or improving performance.
  
  
  
  Check for Deadlocks:
  
  Investigate if there are any deadlocks occurring in the system. You can use database monitoring tools to analyze deadlock situations and resolve them.
  
  
  
  Database Configuration:
  
  Review the database configuration settings related to locking and concurrency. Adjusting these settings may help reduce locking issues.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12, SM21, SM66, and ST22 for monitoring locks, system logs, and dumps.
  Database Logs: Review database logs for any additional information regarding locking issues.
  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 beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.