How To Fix IUUC_MAIN004 - Function &1 started on &2 at &3

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 004

• Message text: Function &1 started on &2 at &3

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.

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN004 - Function &1 started on &2 at &3 ?

  The SAP error message IUUC_MAIN004 typically indicates an issue related to the Data Transfer Process (DTP) or the Delta Queue in the context of SAP Landscape Transformation (SLT) or SAP Data Services. This message is often associated with the replication of data from a source system to a target system.
  Cause:
  The error message IUUC_MAIN004 can occur due to several reasons, including:
  
  Replication Issues: There may be problems with the data replication process, such as network issues, configuration errors, or problems with the source or target systems.
  Delta Queue Problems: The delta queue may be full or not processing correctly, leading to delays or failures in data transfer.
  Configuration Errors: Incorrect settings in the SLT configuration or DTP settings can lead to this error.
  Performance Issues: High load on the source or target system can cause delays in processing, leading to this error message.
  Authorization Issues: The user executing the function may not have the necessary authorizations to perform the operation.
  
  Solution:
  To resolve the IUUC_MAIN004 error, you can take the following steps:
  
  Check Logs: Review the SLT logs and the application logs (transaction SLG1) for more detailed error messages that can provide insights into the root cause.
  Monitor Delta Queue: Use transaction SLT to monitor the delta queue and check if it is full or if there are any stuck entries. You can also use transaction RSCOD to check the status of the DTP.
  Configuration Review: Verify the configuration settings in SLT and ensure that they are correct. Check the connection settings between the source and target systems.
  Performance Tuning: If performance issues are suspected, consider optimizing the system performance by checking for resource bottlenecks (CPU, memory, I/O).
  Authorization Check: Ensure that the user has the necessary authorizations to execute the function. You may need to consult with your security team to verify this.
  Restart the Process: If the issue persists, you may need to restart the replication process or the DTP to clear any temporary issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT (for Landscape Transformation), SLG1 (for application logs), and RSCOD (for DTP monitoring).
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to IUUC_MAIN004. You can search the SAP Support Portal for specific notes.
  Documentation: Review the official SAP documentation for SLT and DTP for best practices and troubleshooting steps.
  
  If the issue continues after following these steps, consider reaching out to SAP support for further assistance.