How To Fix MD_SUBSTN020 - Rule &1 must be relevant for only one application

SAP Error Message - Details

• Message type: E = Error

• Message class: MD_SUBSTN - Messages for Master Data Substitution

• Message number: 020

• Message text: Rule &1 must be relevant for only one application

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MD_SUBSTN020 - Rule &1 must be relevant for only one application ?

  The SAP error message MD_SUBSTN020 indicates that a specific substitution rule (identified by the rule number &1) is not correctly configured because it is relevant for more than one application. This typically occurs in the context of SAP's Master Data Management, particularly in the area of material management or planning.
  Cause:
  The error arises when a substitution rule is defined in such a way that it is associated with multiple applications, which is not allowed. Each substitution rule must be unique to a single application to ensure that the system can apply the rule correctly without ambiguity.
  Solution:
  To resolve this error, you need to check the configuration of the substitution rule in question. Here are the steps you can take:
  
  
  Identify the Rule: Note the rule number indicated in the error message (replace &1 with the actual rule number).
  
  
  Access the Substitution Rule Configuration:
  
  Go to the relevant transaction in SAP (usually in the area of Master Data or Planning).
  Use transaction codes like OB28 (for substitution rules) or navigate through the menu path to find the substitution rules.
  
  
  
  Review the Rule Settings:
  
  Check the applications that the rule is currently assigned to.
  Ensure that the rule is only assigned to one application. If it is assigned to multiple applications, you will need to modify the configuration.
  
  
  
  Modify the Rule:
  
  If the rule is indeed assigned to multiple applications, decide which application it should be relevant for.
  Remove the rule from the other applications to ensure it is only linked to one.
  
  
  
  Test the Configuration:
  
  After making the changes, test the functionality to ensure that the error no longer appears and that the substitution rule works as intended.
  
  
  
  Documentation: Document the changes made for future reference and to maintain clarity in the configuration.
  
  
  Related Information:
  
  Substitution Rules: These are used in SAP to automatically replace certain values or data based on predefined conditions. They are crucial for ensuring data integrity and consistency in processes.
  Application Relevance: Each substitution rule must be relevant to a specific application (e.g., Material Management, Sales and Distribution) to avoid conflicts and ensure proper execution.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or additional guidance provided by SAP.
  
  If you continue to experience issues after following these steps, consider reaching out to your SAP support team or consulting the SAP community for further assistance.