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

WM051 - Overview

• 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.

Unfortunately, there isn't any extra information in this error notice.

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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