How To Fix CNV_IUUC_TCR_MAIN018 - Cannot update alias table (&1) for table &2 of cluster table &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_IUUC_TCR_MAIN - transactional consistent replication main package

• Message number: 018

• Message text: Cannot update alias table (&1) for table &2 of cluster table &3

What causes this issue?

After creating the logging table and the respective alias tables, it was
not possible to store the alias table names in the respective control
table of the central system.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check table IUUC_TCR_TABLES2. This table should contain entries for each
alias table (that is, the relevant mass transfer ID and name of the
logical tables of the cluster table). If this is not the case, you can
try to remove this inconsistency by manually adding the entries to the
table.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_IUUC_TCR_MAIN018 - Cannot update alias table (&1) for table &2 of cluster table &3 ?

  The SAP error message CNV_IUUC_TCR_MAIN018 indicates that there is an issue with updating the alias table for a specific table in a cluster table. This error typically arises during data migration or transformation processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services.
  Cause:
  The error can be caused by several factors, including:
  
  Table Locking: The target table may be locked by another process, preventing updates to the alias table.
  Data Consistency Issues: There may be inconsistencies in the data that prevent the update from being applied.
  Authorization Issues: The user executing the operation may not have the necessary permissions to update the alias table.
  Configuration Issues: There may be misconfigurations in the SLT or data transformation settings.
  Technical Issues: There could be underlying technical issues, such as database connectivity problems or issues with the database itself.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Table Locks:
  
  Use transaction codes like SM12 to check for any locks on the target table. If locks are found, you may need to wait for the locks to be released or contact the user holding the lock.
  
  
  
  Review Data Consistency:
  
  Ensure that the data in the source and target tables is consistent. You may need to run consistency checks or data validation processes.
  
  
  
  Verify Authorizations:
  
  Check the user authorizations to ensure that the user has the necessary permissions to perform updates on the alias table.
  
  
  
  Review Configuration:
  
  Check the configuration settings in SLT or the data transformation tool you are using. Ensure that all settings are correctly configured for the tables involved.
  
  
  
  Check Logs:
  
  Review the logs for more detailed error messages. You can check SLT logs or application logs (transaction SLG1) for additional information that may help diagnose the issue.
  
  
  
  Database Connectivity:
  
  Ensure that there are no connectivity issues with the database. Check the database status and ensure that it is running properly.
  
  
  
  Restart the Process:
  
  If the issue persists, consider restarting the data migration or transformation process after addressing the above points.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT, SM12, SLG1, and SE11 for table definitions.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search the SAP Support Portal for specific notes that may address this error.
  Documentation: Review the official SAP documentation for SLT or the data migration tool you are using for best practices and troubleshooting steps.
  
  If the problem continues after trying these solutions, consider reaching out to SAP support for further assistance.