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

IU423 - Overview

• 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.

What else can you do?

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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.

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 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