How To Fix CNV_10020028 - Elementary relationship &1, target obj.: Table field was not maintained

CNV_10020028 - Overview

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 028

• Message text: Elementary relationship &1, target obj.: Table field was not maintained

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_10020028 - Details

• The SAP error message CNV_10020028 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 an issue with the maintenance of a specific field in a target object, which is likely related to the mapping of source data to the target structure.
  
  Cause:
  The error message suggests that the elementary relationship for a specific field (denoted by &1) in the target object has not been properly maintained. This could be due to several reasons:
  
  Missing Field Mapping: The field in the source data may not have a corresponding field in the target structure, or the mapping may not have been defined correctly.
  Data Type Mismatch: The data type of the source field may not match the expected data type of the target field.
  
  Configuration Issues: There may be configuration issues in the data migration settings that prevent the