How To Fix CNV_MBT520 - &1:Fieldname &2 of structure &3 mentioned in selref not found in sender

CNV_MBT520 - Overview

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 520

• Message text: &1:Fieldname &2 of structure &3 mentioned in selref not found in sender

The selection field mentioned for the reduction of this conversion
object does not exist in the sender system. Thus this selection field
can notbe used for reduction. Please remove the assignment of this
conversion object from reduction. For further assistance please contact
SAP support.

Error message extract from SAP system. Copyright SAP SE.

CNV_MBT520 - Details

• The SAP error message CNV_MBT520 typically occurs during data migration processes, particularly when using the SAP Migration Tool (or similar tools) to transfer data from one system to another. This error indicates that a specific field in the data structure is not found in the sender system, which can lead to issues during the migration process.
  
  Cause:
  The error message CNV_MBT520 is triggered due to one or more of the following reasons:
  
  
  Field Mismatch: The field specified in the error message does not exist in the source structure (sender) that is being referenced. This could be due to a typo, a change in the data model, or an incorrect mapping.
  
  
  Data Structure Changes: If the data structure in the sender system has been modified (e.g., fields added, removed, or renamed) after the migration mapping was created, it can lead to this error.
  
  
  Incorrect Configuration: The configuration settings for the migration might not be set up