How To Fix WG450 - PO &1 rejected: different plants

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 450

• Message text: PO &1 rejected: different plants

Self-Explanatory Message

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• What is the cause and solution for SAP error message WG450 - PO &1 rejected: different plants ?

  SAP Error Message:
  
  WG450 PO &1 rejected: different plants
  
  Meaning / Cause:
  This error occurs when you try to process a Purchase Order (PO) in a workflow or transaction where the plant assigned to the PO line items does not match the expected or allowed plant(s) in the system or workflow step. Essentially, the system is rejecting the PO because the plant(s) specified in the PO differ from the plant(s) configured or permitted for the current process.
  Common scenarios include:  
  
  The PO line items belong to different plants than those allowed in the workflow or approval step.  
  The plant assigned to the PO is not consistent with the plant(s) defined in the purchasing info record, source list, or material master.  
  The workflow or validation rule expects a specific plant, but the PO contains a different one.
  
  
  Where it occurs:
  
  During PO release/approval workflow processing.  
  When creating or changing a PO with multiple plants in a scenario where only one plant is allowed.  
  In custom validations or user-exits that check plant consistency.  
  When integrating with other modules (e.g., WM, MM) that require plant consistency.
  
  
  Solution / How to fix:
  
  
  Check the Plant(s) in the PO:  
  
  Go to the PO and verify the plant assigned to each line item (ME23N or ME22N).  
  Ensure all line items belong to the same plant if the process requires it.
  
  
  
  Verify Workflow or Validation Settings:  
  
  Check the workflow configuration or release strategy to see if it restricts processing to certain plants.  
  Adjust the workflow or release strategy to include the plant(s) used in the PO, if appropriate.
  
  
  
  Check Master Data Consistency:  
  
  Verify the material master (MM03) for the plant assignment.  
  Check purchasing info records and source lists for correct plant assignments.
  
  
  
  Adjust PO or Process:  
  
  If the PO contains multiple plants but the process only supports one, split the PO into multiple POs by plant.  
  Alternatively, adjust the process to handle multiple plants if business requirements allow.
  
  
  
  Check Custom Code / User Exits:  
  
  If custom validations or user-exits are implemented, review them for plant checks that might cause rejection.  
  Modify the logic if necessary.
  
  
  
  
  Additional Information:
  
  Message Class: WG4 (related to workflow and goods movement)  
  Transaction Codes: ME21N (Create PO), ME22N (Change PO), ME23N (Display PO), SWDD (Workflow Builder)  
  Related Notes: Check SAP Notes for any known issues related to plant validation in PO workflows.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  PO rejected because plant(s) in PO differ from expected/allowed plant(s) in workflow.
  
  
  Solution
  Verify and align plant assignments in PO, workflow, and master data; split PO if needed.
  
  
  Where to check
  PO line items, workflow config, release strategy, material master, custom code.
  
  
  
  
  If you provide the exact transaction or process step where the error occurs, I can help with more specific guidance.