How To Fix EA479 - Multiple basic types assigned to extension & (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: EA - IDoc Basis Messages

• Message number: 479

• Message text: Multiple basic types assigned to extension & (see long text)

What causes this issue?

Extension &v1& was used in Release 3.0/3.1 with several basic types.
For Release 4.0, however, an extension can only be linked with one
basic type, in order to simplify the complexity of the dependencies.

System Response

Please note that IDoc processing is not impaired at first. Problems can
arise if changes are made to extension &v1& or one of the basic types
concerned.
The tests regarding segment relationships are only executed with the
basic type assigned. The other basic types (also currently in use) are
ignored.

How to fix this error?

If you plan to process extension &v1& further, you should proceed as
follows:
create several identical copies of your extension
assign one of the basic types used to each of these copies
modify the partner profiles and customer exits that have used the old
extension &v1& until now, and replace the name of the extension with
that of one of your copies.
You should now have created a number of independent extensions, each of
which is linked with a single basic type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EA479 - Multiple basic types assigned to extension & (see long text) ?

  The SAP error message EA479 indicates that there are multiple basic types assigned to an extension in the context of the Data Dictionary (DDIC) in SAP. This typically occurs when you are trying to create or modify a structure or table that has an extension, and the system detects that more than one basic type has been assigned to that extension, which is not allowed.
  Cause:
  
  Multiple Assignments: The primary cause of this error is that the extension of a structure or table has been assigned multiple basic types, which is not permissible in SAP.
  Inconsistent Data Dictionary: There may be inconsistencies in the Data Dictionary where the same extension is incorrectly linked to different basic types.
  Development Errors: Errors during the development process, such as incorrect modifications or imports of objects, can lead to this situation.
  
  Solution:
  
  
  Check the Data Dictionary: 
  
  Go to the Data Dictionary (transaction SE11) and check the structure or table that is causing the error.
  Look for the extensions and verify the basic types assigned to them.
  
  
  
  Remove Duplicate Assignments:
  
  If you find that multiple basic types are assigned to the same extension, you need to remove the duplicates. Ensure that only one basic type is assigned to each extension.
  
  
  
  Adjust the Structure:
  
  If necessary, adjust the structure or table definition to ensure that it adheres to the rules of the Data Dictionary. This may involve creating a new extension or modifying existing ones.
  
  
  
  Transport Requests:
  
  If the issue arose after a transport request, check the transport logs to see if any objects were incorrectly transported. You may need to revert or adjust the transport.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to this error for any specific guidance or updates that may apply to your version of SAP.
  
  
  
  Testing: 
  
  After making the necessary changes, test the structure or table to ensure that the error is resolved and that the system behaves as expected.
  
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE80 (Object Navigator).
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Version Specifics: The behavior of the Data Dictionary can vary between different versions of SAP, so ensure that you are referencing the correct version for your system.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP Basis or ABAP consultant who can provide deeper insights into the issue.