How To Fix CA_TTE585 - Reverse mapping not possible due to ambiguous external value

CA_TTE585 - Overview

• Message type: E = Error

• Message class: CA_TTE - TTE Messages

• Message number: 585

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

What causes this issue?

The system always checks if a accounting key 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 code 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 &V2& systemID2 &V3&.
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.

CA_TTE585 - Details

• The SAP error message CA_TTE585, which states "Reverse mapping not possible due to ambiguous external value," typically occurs in the context of data transfer or mapping processes, particularly when dealing with external values that do not have a clear or unique mapping to internal values in the SAP system.
  
  Cause:
  The error is usually caused by one of the following issues:
  
  
  Ambiguous External Values: The external value being processed does not uniquely correspond to a single internal value. For example, if multiple internal records can match the same external value, the system cannot determine which internal record to use.
  
  
  Data Quality Issues: There may be inconsistencies or duplicates in the external data that lead to ambiguity.
  
  
  
  Configuration Issues: The mapping configuration between external and internal values may not be set up correctly, leading to multiple potential matches.
  
  
  
  Solution:
  To resolve the CA_TTE585 error, you can take the following steps:
  
  
  Check External Values: Review the external values being processed