How To Fix WM051 - Only 1 un ( & ) exists, exclusion not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 051

• Message text: Only 1 un ( & ) exists, exclusion not possible

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 WM051 - Only 1 un ( & ) exists, exclusion not possible ?

  The SAP error message WM051 ("Only 1 un (&) exists, exclusion not possible") typically occurs in the Warehouse Management (WM) module when you are trying to perform an operation that requires multiple handling units (HUs) but only one handling unit is available. This can happen during processes like picking, putaway, or stock transfer where the system expects to exclude a handling unit from a process but finds that only one exists.
  Cause:
  
  Single Handling Unit: The operation you are trying to perform requires the exclusion of a handling unit, but there is only one handling unit available in the system.
  Incorrect Process: The process you are attempting may not be applicable when only one handling unit is present.
  Configuration Issues: There may be configuration settings in the WM module that are not aligned with the expected handling unit behavior.
  
  Solution:
  
  Check Handling Units: Verify the number of handling units available for the operation. If only one exists, you may need to adjust your process to accommodate that.
  Modify the Operation: If the operation requires exclusion, consider whether it is necessary to exclude the handling unit. If not, proceed with the operation without exclusion.
  Review Configuration: Check the configuration settings in the WM module to ensure they are set up correctly for handling units. This may involve reviewing the handling unit management settings.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling units and the operations you are performing.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Handling Units (HUs): In SAP WM, handling units are used to manage stock in a more granular way, allowing for better tracking and management of inventory.
  Warehouse Management Processes: Understanding the various processes in WM (like picking, putaway, and stock transfers) can help in troubleshooting issues related to handling units.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  
  By following these steps, you should be able to resolve the WM051 error and continue with your warehouse management operations.