How To Fix /PLMI/PPE_BO022 - Relationship between &1&3 and child &2&4 not allowed; invalid child class

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/PPE_BO -

• Message number: 022

• Message text: Relationship between &1&3 and child &2&4 not allowed; invalid child class

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMI/PPE_BO022 - Relationship between &1&3 and child &2&4 not allowed; invalid child class ?

  The SAP error message /PLMI/PPE_BO022 indicates that there is an issue with the relationship between a parent object and a child object in the context of SAP's Product Lifecycle Management (PLM) or similar modules. Specifically, the error states that the relationship between the specified parent (&1&3) and child (&2&4) is not allowed due to an invalid child class.
  Cause:
  
  
  Invalid Relationship Definition: The relationship you are trying to establish between the parent and child objects is not defined in the system. This could be due to a configuration issue where the relationship type does not support the specific combination of parent and child classes.
  
  
  Incorrect Object Types: The parent and child objects may not be of compatible types. For example, if the parent is a material and the child is a document, the system may not allow this relationship.
  
  
  Customizations or Enhancements: If there have been customizations or enhancements made to the object types or relationships, it could lead to inconsistencies that trigger this error.
  
  
  Solution:
  
  
  Check Relationship Configuration: Review the configuration settings for the relationships in the relevant customizing transaction (e.g., SPRO). Ensure that the relationship type you are trying to use is valid for the specific parent and child object types.
  
  
  Verify Object Types: Confirm that the parent and child objects are of the correct types and that they are intended to be related. You can check the object types in the relevant master data or configuration transactions.
  
  
  Review Custom Code: If there are any custom developments or enhancements, review the code to ensure that it correctly handles the relationships and does not inadvertently block valid combinations.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on valid relationships between object types in your specific version of SAP.
  
  
  Testing: If changes are made, test the relationship creation again to ensure that the error is resolved.
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like SE11 (Data Dictionary) or SPRO (Customizing) to check the definitions of the object types and relationships.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.