How To Fix CNV_DMC_WDA128 - Field æ&1Æ is not displayed under æData RecordsÆ; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_WDA - Messages used in WDA UI

• Message number: 128

• Message text: Field æ&1Æ is not displayed under æData RecordsÆ; see long text

What causes this issue?

In the SAP HANA Studio, you have added a field to the staging table.
However, the field name is not supported by the SAP S/4HANA migration
cockpit. The column for the field is therefore not displayed under ?Data
Records?.

System Response

How to fix this error?

The structure of the staging table must be adjusted so that it reflects
the latest version of the migration object. This means the field must be
removed from the staging table.

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

Note: Before you start the procedure below, ensure that the field is not
required and can be removed.
To do this, choose the button Start Synchronization. The system will
remove the field that was added to the staging table.
Alternatively, you can remove the field from the staging table directly
in the SAP HANA Studio. You can then add a field with a valid format, if
required.

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 CNV_DMC_WDA128 - Field æ&1Æ is not displayed under æData RecordsÆ; see long text ?

  The SAP error message CNV_DMC_WDA128 typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that a specific field (represented by &1 in the message) is not displayed under the "Data Records" section, which can hinder the data migration process.
  Cause:
  
  Field Configuration: The field in question may not be configured correctly in the source or target system. This could be due to missing field mappings or incorrect data types.
  Data Structure Changes: If there have been changes in the data structure (e.g., fields added or removed) between the source and target systems, the migration tool may not recognize the field.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to view or manipulate the specified field.
  Technical Issues: There could be underlying technical issues, such as bugs in the migration tool or inconsistencies in the data model.
  
  Solution:
  
  Check Field Configuration: Verify that the field is correctly configured in both the source and target systems. Ensure that the field exists in the target structure and is mapped correctly.
  Review Data Mapping: Go through the data mapping settings in the migration cockpit to ensure that all necessary fields are included and correctly mapped.
  Authorization Check: Ensure that the user has the necessary authorizations to access and modify the field in question. This may involve checking user roles and permissions.
  Consult Long Text: The error message suggests checking the long text for more details. This can provide specific information about why the field is not displayed.
  Debugging: If the issue persists, consider debugging the migration process to identify any technical issues or errors in the data handling.
  SAP Notes and Support: Check for any relevant SAP Notes that may address this specific error. If necessary, contact SAP support for assistance.
  
  Related Information:
  
  SAP Data Migration Cockpit: Familiarize yourself with the functionalities and limitations of the DMC, as well as best practices for data migration.
  Field Mapping Documentation: Review documentation related to field mapping and data migration processes to ensure compliance with SAP standards.
  User Authorizations: Understand the role-based access control in SAP to ensure that users have the necessary permissions for data migration tasks.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.