How To Fix /SCF/CL_MDL_MESSAGES020 - Level &1: Parent &2 with child &3 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCF/CL_MDL_MESSAGES -

• Message number: 020

• Message text: Level &1: Parent &2 with child &3 not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCF/CL_MDL_MESSAGES020 - Level &1: Parent &2 with child &3 not allowed ?

  The SAP error message /SCF/CL_MDL_MESSAGES020 Level &1: Parent &2 with child &3 not allowed typically occurs in the context of SAP's Supply Chain Management (SCM) or Advanced Planning and Optimization (APO) modules. This error indicates that there is a hierarchical relationship issue between a parent and child object in a model or planning scenario.
  Cause:
  
  
  Hierarchical Structure Violation: The error suggests that the relationship defined between the parent (object &2) and the child (object &3) is not allowed based on the configuration or business rules set in the system. This could be due to:
  
  Incorrect configuration of the parent-child relationship in the master data.
  The child object is not valid for the specified parent object.
  The parent-child relationship is not defined correctly in the planning model.
  
  
  
  Data Integrity Issues: There may be inconsistencies in the data that prevent the system from recognizing the relationship as valid.
  
  
  Business Rules: Certain business rules may restrict specific parent-child combinations based on the business logic implemented in the system.
  
  
  Solution:
  
  
  Check Configuration: Review the configuration of the parent-child relationships in the relevant master data. Ensure that the relationships are correctly defined and that the child object is valid for the specified parent.
  
  
  Validate Master Data: Ensure that both the parent and child objects are correctly set up in the system. This includes checking attributes, categories, and any other relevant settings.
  
  
  Review Business Rules: If there are specific business rules that govern the relationships, review them to ensure that the intended relationship is allowed.
  
  
  Data Consistency Check: Run data consistency checks to identify any discrepancies in the master data that may be causing the issue.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional context and troubleshooting steps.
  
  
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance, providing them with the error details and context.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use transaction codes like /SCF/MDL for model management or /SCF/MDL_CHECK for checking model consistency.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional insights.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.