How To Fix DMCLG521 - Different rule for field '&1' (structure &2) in '&3' and '&4'

DMCLG521 - Overview

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 521

• Message text: Different rule for field '&1' (structure &2) in '&3' and '&4'

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG521 - Different rule for field '&1' (structure &2) in '&3' and '&4' ?

  The SAP error message DMCLG521 indicates that there is a discrepancy in the rules defined for a specific field in two different structures or contexts. This typically occurs in the context of data modeling or data governance, where different rules or validations are applied to the same field in different scenarios.
  
  Cause:
  The error arises when:
  
  The same field (denoted as &1) in two different structures (denoted as &2 and &3 or &4) has been defined with different validation rules or characteristics.
  This can happen during data migration, data modeling, or when integrating different data sources where the same field is expected to have consistent rules but is defined differently in different contexts.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the Structures: Determine which structures are being referenced in the error message. This will help you understand where the discrepancies are occurring.
  
  
  Review Field Definitions: Check the definitions of the field &1 in