How To Fix CA_TTE619 - Reverse mapping not possible due to ambiguous external value

SAP Error Message - Details

• Message type: E = Error

• Message class: CA_TTE - TTE Messages

• Message number: 619

• Message text: Reverse mapping not possible due to ambiguous external value

What causes this issue?

The system always checks if a business partner tax group can be mapped
based on an external object assignment. If 2 or more external
assignments exists for 1 internal value, a error message is written to
the TTE trace log.

System Response

Processing terminated.

How to fix this error?

If an external tax group should be mapped, proceed as follows:
Call activity: <DS:SIMG.SIMGMAP_PARTNER>Assign Objects From External
Systems</> (Cross-Application Components -> Transaction Tax Engine ->
Utilities -> Assign Objects From External Systems)
Select the relevant system: systemID1 &V3& systemID2 &V4&, country and
tax type &V2&
Check that the TTE internal value &V1& has a unique relation with the
external value.
Save your entries.
Refresh customizing immediately with the activity
<DS:SIMG.SIMG_REFRESH>Immediate Customizing Refresh</>.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CA_TTE619 - Reverse mapping not possible due to ambiguous external value ?

  The SAP error message CA_TTE619, which states "Reverse mapping not possible due to ambiguous external value," typically occurs in the context of data mapping or transformation processes, particularly when dealing with external values that cannot be uniquely identified or mapped back to their original internal representations.
  Cause:
  
  Ambiguous External Values: The error arises when the system encounters an external value that could correspond to multiple internal values. This ambiguity prevents the system from determining which internal value should be used for the reverse mapping.
  Data Quality Issues: Inconsistent or poorly defined external data can lead to situations where the same external value is associated with different internal values.
  Configuration Issues: Incorrect or incomplete configuration of the mapping rules or transformation logic can also lead to this error.
  
  Solution:
  
  Review Mapping Configuration: Check the mapping configuration to ensure that each external value is uniquely mapped to an internal value. If there are multiple mappings for the same external value, you will need to resolve this ambiguity.
  Data Cleansing: Ensure that the external data being processed is clean and consistent. This may involve standardizing values, removing duplicates, or correcting errors in the data.
  Enhance Mapping Logic: If necessary, enhance the mapping logic to include additional criteria that can help disambiguate the external values. This could involve adding more context or using additional fields to refine the mapping.
  Consult Documentation: Refer to SAP documentation or support resources for specific guidance on handling this error in the context of your particular SAP module or application.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that the mapping works as expected.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  By addressing the root cause of the ambiguity and ensuring that the mapping is correctly configured, you should be able to resolve the CA_TTE619 error.