How To Fix WN661 - Customer or supplier assignment of plant &1 different in target system

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 661

• Message text: Customer or supplier assignment of plant &1 different in target system

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 WN661 - Customer or supplier assignment of plant &1 different in target system ?

  The SAP error message WN661 indicates that there is a mismatch in the customer or supplier assignment for a specific plant between the source system and the target system during a data transfer or migration process. This typically occurs when you are trying to replicate or transfer data related to a plant, and the customer or supplier assignments do not match between the two systems.
  Cause:
  
  Data Inconsistency: The customer or supplier assignments in the source system may not be consistent with those in the target system. This can happen if changes were made in one system but not reflected in the other.
  Missing Data: The target system may not have the necessary customer or supplier records that are referenced in the source system.
  Configuration Issues: There may be configuration differences between the two systems that affect how customer or supplier assignments are handled.
  
  Solution:
  
  Data Comparison: Compare the customer and supplier assignments in both the source and target systems. Identify any discrepancies and resolve them by updating the target system to match the source system.
  Data Migration: If the target system is missing certain customer or supplier records, you may need to migrate those records from the source system to the target system.
  Check Configuration: Review the configuration settings related to customer and supplier assignments in both systems to ensure they are aligned.
  Use Transaction Codes: Utilize relevant transaction codes (e.g., XD01, XD02 for customers, MK01, MK02 for suppliers) to create or update the necessary records in the target system.
  Consult Documentation: Refer to SAP documentation or support notes for any specific guidance related to the error message WN661.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes related to customer and supplier master data management.
  Data Migration Tools: If you are using tools like SAP Data Services or LSMW (Legacy System Migration Workbench), ensure that the mapping and transformation rules are correctly set up.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error message.
  Testing: After making the necessary changes, perform testing to ensure that the data transfer or replication process works without errors.
  
  By addressing the underlying causes of the mismatch and ensuring that both systems are aligned, you should be able to resolve the WN661 error message effectively.