How To Fix DMC_RT_MSG066 - Reading of lock table terminated with exception &1

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_RT_MSG - DMC: Runtime Object Messages

• Message number: 066

• Message text: Reading of lock table terminated with exception &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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_RT_MSG066 - Reading of lock table terminated with exception &1 ?

  The SAP error message DMC_RT_MSG066 indicates that there was an issue while reading the lock table, and it was terminated with an exception. This error typically occurs in the context of data management and replication processes, particularly when using SAP Data Management or SAP Landscape Management tools.
  Cause:
  The error can be caused by several factors, including:
  
  Database Lock Issues: There may be locks on the database that prevent the reading of the lock table.
  Network Issues: Connectivity problems between the application server and the database can lead to this error.
  Configuration Issues: Incorrect configuration settings in the SAP system or the database can lead to exceptions when accessing the lock table.
  Resource Limitations: Insufficient resources (like memory or CPU) on the database server can cause timeouts or failures in reading the lock table.
  Corrupted Lock Table: The lock table itself may be corrupted or not properly initialized.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Database Locks: Use transaction codes like SM12 to check for any existing locks in the database. If there are unnecessary locks, you may need to release them.
  
  
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  
  
  Network Connectivity: Ensure that there are no network issues between the application server and the database. You can test connectivity using tools like ping or telnet.
  
  
  Configuration Review: Verify the configuration settings for the SAP system and the database. Ensure that they are correctly set up for data management operations.
  
  
  Resource Monitoring: Monitor the resource usage on the database server. If resources are low, consider optimizing the database or increasing the resources available.
  
  
  Restart Services: Sometimes, simply restarting the relevant SAP services or the database can resolve transient issues.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error message or provide patches.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (for lock entries), SM21 (for system logs), and ST22 (for dumps) to diagnose issues.
  SAP Documentation: Review the official SAP documentation for data management and replication processes for best practices and troubleshooting tips.
  System Performance: Regularly monitor system performance and health to prevent issues related to resource limitations.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the DMC_RT_MSG066 error in your SAP environment.