How To Fix WN066 - Entries exist as "Supplying plant" and "Receiving plant" for plant &

SAP Error Message - Details

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 066

• Message text: Entries exist as "Supplying plant" and "Receiving plant" for plant &

Self-Explanatory Message

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• What is the cause and solution for SAP error message WN066 - Entries exist as "Supplying plant" and "Receiving plant" for plant & ?

  The SAP error message WN066 indicates that there are existing entries in the system where a plant is both a "Supplying plant" and a "Receiving plant." This typically occurs in the context of stock transport orders (STOs) or inter-plant stock transfers, where the system is trying to process a transaction that involves transferring stock between two plants, but there is a conflict in the configuration or data.
  Cause:
  
  Configuration Issues: The plants involved may not be correctly configured in the system for stock transport orders. This can happen if the plants are set up incorrectly in the material master or if the necessary settings for inter-plant transfers are not in place.
  Data Entry Errors: There may be incorrect entries in the material master or in the stock transport order itself, leading to a situation where the same plant is being referenced as both supplying and receiving.
  Stock Transport Order Settings: The settings for stock transport orders may not be correctly defined, leading to conflicts when trying to process the order.
  
  Solution:
  
  Check Plant Configuration: Verify the configuration of the plants involved. Ensure that they are set up correctly for stock transport orders. This includes checking the material master records for both plants.
  Review Material Master Data: Check the material master data for the materials involved in the transaction. Ensure that the supplying and receiving plants are correctly defined and that there are no conflicting entries.
  Analyze Stock Transport Order: Review the stock transport order to ensure that the supplying and receiving plants are correctly specified. Make sure that the order is not trying to transfer stock to itself.
  Transaction Codes: Use transaction codes like MM03 (Display Material), ME23N (Display Purchase Order), or MB52 (List Warehouse Stocks on Hand) to analyze the relevant data.
  Consult Documentation: Refer to SAP documentation or help files for specific configuration settings related to stock transport orders and inter-plant transfers.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME21N (Create Purchase Order), ME22N (Change Purchase Order), and MB1B (Transfer Posting) for managing stock transfers.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional insights or solutions for specific scenarios.
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to perform stock transport orders and that there are no restrictions in place that could lead to this error.
  
  By following these steps, you should be able to identify the root cause of the WN066 error and implement the necessary corrections to resolve it.