How To Fix /SCMB/MC_PB_DEF174 - Mat. &1 is child of ref. mat. &2; child-parent combinations not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMB/MC_PB_DEF -

• Message number: 174

• Message text: Mat. &1 is child of ref. mat. &2; child-parent combinations not allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCMB/MC_PB_DEF174 - Mat. &1 is child of ref. mat. &2; child-parent combinations not allowed ?

  The SAP error message /SCMB/MC_PB_DEF174 indicates that there is an issue with the relationship between materials in the SAP system, specifically in the context of parent-child relationships in the material master data. This error typically arises when you are trying to create or modify a material that is defined as a child of a reference material, but the system does not allow such combinations.
  Cause:
  
  Parent-Child Relationship: The error occurs when you attempt to create or modify a material that is designated as a child of another material (the reference material), but the system settings or configuration do not permit this type of relationship.
  Configuration Settings: The configuration in the SAP system may not allow certain combinations of parent and child materials, leading to this error.
  Data Integrity Issues: There may be inconsistencies or incorrect data entries in the material master records that violate the expected parent-child relationships.
  
  Solution:
  
  Check Material Master Data: Review the material master data for both the child material (Material &1) and the reference material (Material &2). Ensure that the relationships are correctly defined and that the child material is not incorrectly set as a child of the reference material.
  Adjust Configuration: If the business process requires the use of parent-child relationships, you may need to adjust the configuration settings in the SAP system to allow for these combinations. This may involve consulting with your SAP configuration team or reviewing the relevant customizing settings.
  Data Correction: If there are data integrity issues, correct the material master records to ensure that they comply with the expected relationships. This may involve deleting or modifying the child-parent relationship.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing material relationships and resolving related errors.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as MM02 (Change Material) or MM03 (Display Material) to review and modify material master data.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on managing material relationships.
  User Roles and Authorizations: Ensure that you have the necessary authorizations to make changes to material master data, as restrictions may also lead to errors.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or consult with an SAP expert for further assistance.