How To Fix IU421 - No tables planned for conversion

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 421

• Message text: No tables planned for conversion

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 IU421 - No tables planned for conversion ?

  The SAP error message IU421 ("No tables planned for conversion") typically occurs during the process of data migration or system conversion, particularly when using tools like the SAP Software Update Manager (SUM) or the SAP S/4HANA Migration Cockpit. This error indicates that the system did not find any database tables that are scheduled for conversion in the current migration or upgrade process.
  Causes:
  
  Incorrect Configuration: The migration or upgrade configuration may not have been set up correctly, leading to no tables being identified for conversion.
  Missing or Incomplete Customization: If there are custom tables or specific configurations that are not included in the migration plan, this error may occur.
  Version Compatibility: The source system may not be compatible with the target system, leading to no tables being eligible for conversion.
  Data Model Changes: If the data model has changed significantly between versions, certain tables may no longer be relevant or required for conversion.
  Technical Issues: There may be underlying technical issues or bugs in the migration tools being used.
  
  Solutions:
  
  Check Migration Configuration: Review the migration or upgrade configuration settings to ensure that all necessary tables are included and correctly configured for conversion.
  Review Custom Objects: If you have custom tables or objects, ensure they are properly defined in the migration plan. You may need to manually include them if they are not automatically detected.
  Use the Right Tools: Ensure you are using the correct version of the SAP Software Update Manager or Migration Cockpit that is compatible with your source and target systems.
  Consult SAP Notes: Check for any relevant SAP Notes or documentation that may address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  Run Pre-Checks: Utilize the pre-check tools provided by SAP to identify any potential issues before starting the migration process. This can help catch configuration problems early.
  Contact SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide more detailed insights based on your specific system configuration and logs.
  
  Related Information:
  
  SAP Notes: Look for specific SAP Notes related to the IU421 error message. These notes often contain troubleshooting steps or patches that can resolve the issue.
  Migration Guides: Refer to the official SAP migration guides for your specific version and scenario. These guides provide detailed steps and best practices for successful migrations.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues. Sharing experiences can lead to helpful solutions.
  
  By following these steps, you should be able to diagnose and resolve the IU421 error effectively.