How To Fix CNV_00001257 - Target field &1 is mapped by multiple field mappings of source table &1

CNV_00001257 - Overview

• Message type: E = Error

• Message class: CNV_00001 - Message class for CWB settings maintenance programs

• Message number: 257

• Message text: Target field &1 is mapped by multiple field mappings of source table &1

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

CNV_00001257 - Details

• The SAP error message CNV_00001257 indicates that there is a conflict in the data mapping during a data migration or conversion process. Specifically, it means that the target field in the target table is being mapped by multiple source fields from the source table, which can lead to ambiguity in the data transfer process.
  
  Cause:
  The error typically arises in scenarios where:
  
  Multiple source fields are trying to populate the same target field, which is not allowed.
  There may be an incorrect configuration in the mapping settings, leading to overlapping mappings.
  The data model may have changed, and the mappings have not been updated accordingly.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Review the Mapping Configuration:
  
  Check the mapping configuration for the specific target field mentioned in the error message.
  Identify all the source fields that are mapped to the target field.
  
  
  
  Eliminate Redundant Mappings:
  
  Determine which source field should be the primary source for the target field.
  Remove or