How To Fix AXT_MIGRATION004 - Underlying structure &1 is not compatible for a migration

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_MIGRATION - Messages for EEWB migration

• Message number: 004

• Message text: Underlying structure &1 is not compatible for a migration

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_MIGRATION004 - Underlying structure &1 is not compatible for a migration ?

  The SAP error message AXT_MIGRATION004 indicates that there is an issue with the underlying structure of a data object that is being migrated. This error typically arises during data migration processes, such as when using the SAP S/4HANA Migration Cockpit or other migration tools. The message suggests that the structure of the source data does not match the expected structure in the target system.
  Cause:
  
  Incompatible Data Structure: The source data structure may not align with the target structure required for migration. This can happen if there are differences in field types, lengths, or if certain fields are missing.
  Version Mismatch: The version of the source system may not be compatible with the target system, leading to structural differences.
  Custom Fields: If there are custom fields in the source system that do not exist in the target system, this can lead to incompatibility.
  Data Model Changes: Changes in the data model between versions of SAP can also cause this error, especially if the migration is from an older version to a newer one.
  
  Solution:
  
  Check Data Structure: Review the data structure of the source and target systems. Ensure that all required fields in the target system are present in the source data and that their types and lengths match.
  Use Migration Templates: Utilize the migration templates provided by SAP for the specific migration scenario. These templates often include the correct structure and mappings.
  Adjust Custom Fields: If there are custom fields in the source system, consider how they should be handled in the target system. You may need to create corresponding fields in the target or adjust the migration process to exclude them.
  Data Mapping: Ensure that the data mapping is correctly defined in the migration tool. This includes verifying that all mappings are set up according to the target structure.
  Consult Documentation: Refer to the SAP documentation for the specific migration scenario you are working on. This documentation often provides insights into common issues and their resolutions.
  Testing: Perform a test migration with a small subset of data to identify any structural issues before attempting a full migration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on migration issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit, as it provides tools and templates for data migration.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can offer solutions or workarounds.
  
  By addressing the underlying structural issues and ensuring compatibility between the source and target systems, you should be able to resolve the AXT_MIGRATION004 error and successfully complete the migration process.