How To Fix CNV891 - Field &2-&1 excluded but mapping values exist

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 891

• Message text: Field &2-&1 excluded but mapping values exist

What causes this issue?

In activity <DS:SIMG.CNV_00001_D_CHK_MAP>Check Fields for Mapping Values
</>, field &V2&-&V1& was excluded from the conversion. However, during
a recheck of this field, the system identified that mapping values exist
for this field. This means that the field should be included in the
conversion.

System Response

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

How to fix this error?

Contact SAP for support.

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 CNV891 - Field &2-&1 excluded but mapping values exist ?

  The SAP error message CNV891 Field &2-&1 excluded but mapping values exist typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is a mismatch between the fields defined in the mapping and the actual data being processed.
  Cause:
  
  Field Exclusion: The field specified in the error message (represented by &2 and &1) has been excluded from the mapping configuration, but there are still values present in the source data that are trying to be mapped to this field.
  Mapping Configuration: The mapping configuration may not be set up correctly, leading to discrepancies between the source data and the target structure.
  Data Quality Issues: The source data may contain unexpected or invalid values that do not align with the defined mapping.
  
  Solution:
  
  
  Review Mapping Configuration:
  
  Check the mapping configuration in the migration tool to ensure that the field in question is included in the mapping.
  If the field should be included, update the mapping to include it and define how the values should be transformed or mapped.
  
  
  
  Data Validation:
  
  Validate the source data to ensure that it conforms to the expected format and values for the target structure.
  Cleanse the data if necessary to remove or correct any invalid entries.
  
  
  
  Adjust Exclusion Settings:
  
  If the field is intentionally excluded, ensure that there are no values in the source data that are trying to map to this field. You may need to filter out these values or adjust the source data accordingly.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific migration tool you are using to understand the requirements and constraints related to field mappings.
  
  
  
  Testing:
  
  After making changes, perform a test run of the migration process to ensure that the error is resolved and that the data is being mapped correctly.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for mapping and transforming data during migration.
  Data Migration Best Practices: Follow best practices for data migration, including thorough testing, data cleansing, and validation processes to minimize errors during the migration.
  
  By addressing the mapping configuration and ensuring data quality, you should be able to resolve the CNV891 error and successfully complete the data migration process.