How To Fix BA123 - Structure &2 is not known in ABAP Dictionary

SAP Error Message - Details

• Message type: E = Error

• Message class: BA - Data Archiving

• Message number: 123

• Message text: Structure &2 is not known in ABAP Dictionary

What causes this issue?

Structure &V2& is contained in the definition of archiving object or
archiving class &V1&. This structure is not recognized by the ABAP
Dictionary in the SAP System.

System Response

Archiving is terminated.

How to fix this error?

If you are using an SAP archiving object, report this information to
SAP. If you are using a customer archiving object or a customer
archiving class, remove structure &V2& from the definition of archiving
object or archiving class &V1& .

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BA123 - Structure &2 is not known in ABAP Dictionary ?

  The SAP error message BA123, which states "Structure &2 is not known in ABAP Dictionary," typically occurs when the ABAP program or report is trying to reference a structure that is not defined in the ABAP Dictionary. This can happen for several reasons, including:
  Causes:
  
  Missing Structure: The structure that is being referenced does not exist in the ABAP Dictionary.
  Typographical Error: There may be a typo in the name of the structure being referenced in the code.
  Transport Issues: The structure may exist in a different system (e.g., development, quality assurance, or production) but has not been transported to the current system.
  Authorization Issues: The user may not have the necessary authorizations to access the structure.
  Namespace Issues: The structure might be in a different namespace that is not accessible in the current context.
  
  Solutions:
  
  Check Structure Existence: Verify that the structure exists in the ABAP Dictionary. You can do this by using transaction SE11 (Data Dictionary) and searching for the structure by name.
  Correct Typographical Errors: Double-check the spelling of the structure name in your ABAP code to ensure it matches the name in the ABAP Dictionary.
  Transport the Structure: If the structure exists in another system, ensure that it is properly transported to the current system.
  Check Authorizations: Ensure that the user has the necessary authorizations to access the structure. This can be checked with transaction SU53 or by consulting with your security team.
  Namespace Verification: If the structure is in a different namespace, ensure that the program has access to that namespace or that the structure is correctly defined in the current namespace.
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE11: Data Dictionary to check the existence of structures.
  SE80: Object Navigator to view the program and its components.
  SE37: Function Builder to check if the structure is used in any function modules.
  
  
  
  Debugging: If you are unsure where the error is occurring, you can use the debugger to step through the code and identify the exact point of failure.
  
  
  Documentation: Refer to SAP Help documentation for more details on ABAP Dictionary and structures.
  
  
  By following these steps, you should be able to identify the cause of the BA123 error and implement the appropriate solution.