How To Fix IUUC_CLOG_UI_VIEW018 - Cannot refresh change log; restart transaction and try again

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_CLOG_UI_VIEW - SLT Change Log User Interface - Views

• Message number: 018

• Message text: Cannot refresh change log; restart transaction and try again

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 IUUC_CLOG_UI_VIEW018 - Cannot refresh change log; restart transaction and try again ?

  The SAP error message "IUUC_CLOG_UI_VIEW018 Cannot refresh change log; restart transaction and try again" typically occurs in the context of SAP's Change Data Capture (CDC) functionality, particularly when working with the SAP Landscape Transformation (SLT) replication server. This error indicates that there is an issue with refreshing the change log data, which is essential for tracking changes in the source system.
  Causes:
  
  Database Locking Issues: The change log table may be locked by another transaction, preventing the refresh operation from completing.
  Connection Problems: There may be issues with the connection to the database or the SLT server.
  Data Consistency Issues: There could be inconsistencies in the change log data that prevent it from being refreshed.
  System Performance: High system load or performance issues may lead to timeouts or failures in refreshing the change log.
  Configuration Issues: Incorrect configuration settings in the SLT or related systems may lead to this error.
  
  Solutions:
  
  Restart the Transaction: As the error message suggests, try restarting the transaction. This can sometimes resolve temporary issues.
  Check for Locks: Use transaction codes like SM12 to check for any locks on the change log tables. If you find locks, you may need to resolve them by terminating the blocking sessions.
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  Check SLT Configuration: Ensure that the SLT configuration is correct and that all necessary settings are properly configured.
  Monitor System Performance: Use transaction ST22 to check for dumps and SM37 to monitor job statuses. If the system is under heavy load, consider optimizing performance.
  Database Connection: Verify that the connection to the database is stable and that there are no network issues affecting it.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT, SM12, SM21, ST22, and SM37 for monitoring and troubleshooting.
  Documentation: Review the official SAP documentation for SLT and change log management for best practices and configuration guidelines.
  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 necessary to involve your SAP Basis team or open a support ticket with SAP for further assistance.