How To Fix WB2_ASGT156 - TC &1: Supplier cannot be changed. Items have predecessor or successors.

SAP Error Message - Details

• Message type: E = Error

• Message class: WB2_ASGT - Shadow items ans assignments

• Message number: 156

• Message text: TC &1: Supplier cannot be changed. Items have predecessor or successors.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WB2_ASGT156 - TC &1: Supplier cannot be changed. Items have predecessor or successors. ?

  The SAP error message WB2_ASGT156 indicates that a supplier cannot be changed for a specific transaction because there are items that have predecessor or successor relationships. This typically occurs in the context of procurement or inventory management where items are linked in a way that affects their processing.
  Cause:
  
  Predecessor/Successor Relationships: The items in question are part of a chain where one item (the predecessor) must be completed or processed before another item (the successor) can be handled. Changing the supplier for these items can disrupt this chain.
  Data Integrity: SAP enforces data integrity rules to ensure that changes do not lead to inconsistencies in the procurement or inventory processes.
  
  Solution:
  
  Review Item Relationships: Check the predecessor and successor relationships for the items involved. You may need to analyze the item master data or the specific transaction to understand how they are linked.
  Change Supplier for Individual Items: If possible, consider changing the supplier for individual items that do not have such relationships, rather than attempting to change the supplier for the entire group.
  Remove Relationships: If it is necessary to change the supplier, you may need to first remove or adjust the predecessor/successor relationships. This could involve completing or canceling existing transactions related to those items.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling predecessor and successor relationships in your version of SAP.
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help you analyze item relationships, such as MM03 (Display Material), ME23N (Display Purchase Order), or others related to material management.
  SAP Notes: Check for any SAP Notes that may address this specific error or provide additional context or solutions.
  User Roles and Permissions: Ensure that you have the necessary permissions to make changes to suppliers and item relationships in the system.
  
  By following these steps, you should be able to address the error message WB2_ASGT156 and successfully manage supplier changes in your SAP environment.