How To Fix IUUC_MAIN123 - Check manually if all external interfaces have been disabled

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 123

• Message text: Check manually if all external interfaces have been disabled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN123 - Check manually if all external interfaces have been disabled ?

  The SAP error message IUUC_MAIN123 indicates that there are external interfaces that have not been disabled, which can lead to issues during the execution of certain processes, particularly in the context of SAP Landscape Transformation (SLT) or Data Replication.
  Cause:
  The error typically arises when the system is trying to perform a data replication or transformation task, but there are still active external interfaces that could interfere with the process. This can happen if:
  
  External systems are still connected and sending data.
  There are ongoing data replication tasks that have not been properly stopped.
  Configuration settings in the SLT or related systems have not been correctly adjusted to disable these interfaces.
  
  Solution:
  To resolve the IUUC_MAIN123 error, follow these steps:
  
  
  Check Active Interfaces:
  
  Go to the SLT configuration and check for any active external interfaces. This can usually be done in transaction code LTRC (SLT Monitoring).
  Look for any replication tasks that are still running or any connections that are still active.
  
  
  
  Disable External Interfaces:
  
  If you find any active interfaces, you will need to disable them. This can typically be done in the SLT configuration settings or through the relevant transaction codes.
  Ensure that all data replication tasks are stopped. You can use transaction LTRC to stop any ongoing tasks.
  
  
  
  Review Configuration:
  
  Review the configuration settings for the SLT system to ensure that all external interfaces are set to be disabled as required.
  Check for any scheduled jobs or processes that might be re-enabling these interfaces.
  
  
  
  Manual Check:
  
  As the error message suggests, perform a manual check of all external interfaces. This may involve checking the settings in the source and target systems to ensure that they are not inadvertently sending or receiving data.
  
  
  
  Restart the Process:
  
  Once you have confirmed that all external interfaces are disabled, you can attempt to restart the process that triggered the error.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTRC for monitoring SLT, LT01 for data transfer, and SLT Configuration transactions.
  Documentation: Refer to SAP Help documentation for SLT and data replication for detailed guidance on managing external interfaces.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error message.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance, as there may be underlying issues specific to your system configuration.