How To Fix AU255 - You cannot enter subnumber &1 for legacy asset &2

SAP Error Message - Details

• Message type: E = Error

• Message class: AU - FI-AA utility program error messages

• Message number: 255

• Message text: You cannot enter subnumber &1 for legacy asset &2

What causes this issue?

The asset sub-number &V1& could not be created, since there is an error
in the asset main number belonging to it. The main number with
the error is asset number &V2&.

How to fix this error?

Correct the error in the asset main number. After the main number is
created, you can create the sub-number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AU255 - You cannot enter subnumber &1 for legacy asset &2 ?

  The SAP error message AU255, which states "You cannot enter subnumber &1 for legacy asset &2," typically occurs in the context of asset accounting when there is an issue with the subnumber of a legacy asset during transactions such as asset transfers, adjustments, or postings.
  Cause:
  
  Invalid Subnumber: The subnumber you are trying to enter does not exist for the specified legacy asset. This can happen if the subnumber was not created or if it has been deleted.
  Legacy Data Issues: If the asset was migrated from a legacy system, there may be inconsistencies or missing data related to subnumbers.
  Configuration Issues: The configuration settings in the asset accounting module may not allow for the use of subnumbers for certain types of assets or transactions.
  Transaction Type Restrictions: Certain transaction types may not support subnumbers, leading to this error when attempting to use them.
  
  Solution:
  
  Verify Subnumber: Check if the subnumber you are trying to enter is valid and exists for the specified legacy asset. You can do this by navigating to the asset master data and reviewing the subnumbers associated with the asset.
  Check Asset Master Data: Ensure that the asset master data is complete and correctly configured. If the asset was migrated, verify that all necessary data was transferred correctly.
  Review Configuration: Check the configuration settings in the Asset Accounting module to ensure that subnumbers are allowed for the type of asset and transaction you are working with.
  Use Correct Transaction Type: Make sure you are using the appropriate transaction type that supports subnumbers. If the transaction does not support subnumbers, you may need to adjust your approach.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling legacy assets and subnumbers.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like AS03 (Display Asset), AS02 (Change Asset), or AS01 (Create Asset) to manage asset data.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your system configuration and business processes.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.