How To Fix CA_TTE583 - Reverse mapping not possible due to ambiguous external value

CA_TTE583 - Overview

• Message type: E = Error

• Message class: CA_TTE - TTE Messages

• Message number: 583

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

What causes this issue?

The system always checks if a business partner ID 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.

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

System Response

Processing terminated.

How to fix this error?

If an external business partner ID 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</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CA_TTE583 - Details

• The SAP error message CA_TTE583, 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:
  
  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 Inconsistency: There may be inconsistencies in the data being processed, such as duplicate entries or missing mappings in the configuration.
  
  Configuration Issues: The mapping configuration may not be set up correctly, leading to multiple potential matches for a single external value.
  
  
  Solution:
  
  Check Mapping Configuration: Review the mapping configuration in the relevant transaction (e.g., transaction code TTE) to ensure that each external value has a unique corresponding internal