How To Fix CNV_IUUC_REPLICATION390 - There is already a listener registered for configuration &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_IUUC_REPLICATION - IUUC replication messages (HANA)

• Message number: 390

• Message text: There is already a listener registered for configuration &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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_IUUC_REPLICATION390 - There is already a listener registered for configuration &1 ?

  The SAP error message CNV_IUUC_REPLICATION390 indicates that there is already a listener registered for a specific configuration in the SAP system. This error typically occurs in the context of SAP Landscape Transformation (SLT) replication setups, where multiple listeners may be trying to register for the same configuration.
  Cause:
  
  Duplicate Listener Registration: The most common cause of this error is that a listener for the specified configuration is already active or has been registered previously. This can happen if:
  
  The SLT system was restarted, and the listener was not properly deregistered.
  There are multiple instances of the SLT replication setup trying to register for the same configuration.
  A configuration was not properly cleaned up after a previous replication job was stopped or failed.
  
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Active Listeners:
  
  Use transaction code SLT in the SAP GUI to check the status of the existing listeners.
  Navigate to the relevant configuration and see if a listener is already registered.
  
  
  
  Deregister Existing Listener:
  
  If you find that a listener is already registered, you may need to deregister it. This can typically be done through the SLT configuration interface.
  You can also use the function module CNV_IUUC_REPLICATION_DEACTIVATE to deactivate the listener programmatically.
  
  
  
  Restart the SLT Replication:
  
  After deregistering the existing listener, try to restart the SLT replication process.
  Ensure that there are no other processes or jobs that might be trying to register the same listener simultaneously.
  
  
  
  Check for Configuration Issues:
  
  Review the configuration settings to ensure that there are no misconfigurations that could lead to multiple listeners being registered.
  
  
  
  System Logs:
  
  Check the system logs (transaction SM21) for any additional error messages or warnings that might provide more context about the issue.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation or notes related to SLT and replication for any specific guidelines or troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT, SM21 (System Log), and SM37 (Job Monitoring) for monitoring and managing SLT processes.
  SAP Notes: Search for SAP Notes related to SLT replication issues, as they may provide additional insights or patches that could resolve the problem.
  SLT Configuration: Understanding the SLT configuration and architecture can help in troubleshooting and preventing such issues in the future.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.