How To Fix IU421 - No tables planned for conversion

IU421 - Overview

• 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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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