How To Fix IU423 - Only small part of data transfer finished; do not resume upgrade

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 423

• Message text: Only small part of data transfer finished; do not resume upgrade

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 IU423 - Only small part of data transfer finished; do not resume upgrade ?

  The SAP error message IU423, which states "Only small part of data transfer finished; do not resume upgrade," typically occurs during the upgrade process of an SAP system. This error indicates that the data transfer process has not completed successfully, and resuming the upgrade could lead to inconsistencies or further issues.
  Causes:
  
  Network Issues: Interruptions in network connectivity can lead to incomplete data transfers.
  Insufficient Resources: Lack of system resources (CPU, memory, disk space) can cause the data transfer to fail.
  Database Locking: If the database is locked or if there are ongoing transactions that interfere with the upgrade process, it can lead to this error.
  Configuration Errors: Incorrect configuration settings in the upgrade process can lead to failures in data transfer.
  Version Compatibility: Issues related to compatibility between the source and target versions of SAP can also cause this error.
  
  Solutions:
  
  Check Logs: Review the upgrade logs for detailed error messages that can provide insights into what went wrong during the data transfer.
  Network Stability: Ensure that the network connection is stable and that there are no interruptions during the upgrade process.
  Resource Allocation: Verify that the system has adequate resources (CPU, memory, disk space) allocated for the upgrade. Increase resources if necessary.
  Database Status: Check the status of the database to ensure it is not locked and that there are no ongoing transactions that could interfere with the upgrade.
  Configuration Review: Double-check the configuration settings for the upgrade process to ensure they are correct.
  Restart Upgrade: If the error persists, it may be necessary to restart the upgrade process from the beginning, ensuring that all prerequisites are met and that the environment is stable.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that may address this specific error.
  
  Related Information:
  
  SAP Upgrade Guide: Refer to the official SAP upgrade guide for detailed steps and best practices for performing upgrades.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue cannot be resolved, consider reaching out to SAP Support for assistance, providing them with the logs and details of the error.
  
  By following these steps, you should be able to diagnose and resolve the IU423 error effectively.