How To Fix /SCWM/TO_WHR018 - Warehouse request &1, item &2, already assigned to a wave

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/TO_WHR -

• Message number: 018

• Message text: Warehouse request &1, item &2, already assigned to a wave

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/TO_WHR018 - Warehouse request &1, item &2, already assigned to a wave ?

  The SAP error message /SCWM/TO_WHR018 indicates that a warehouse request (TO - Transfer Order) is already assigned to a wave in the Extended Warehouse Management (EWM) module. This typically occurs when you attempt to assign a warehouse request or item that is already linked to an existing wave, which can lead to conflicts in processing.
  Cause:
  
  Duplicate Assignment: The warehouse request or item is already part of a wave, and the system does not allow reassigning it to another wave.
  Wave Management Settings: The configuration settings in the EWM system may restrict the reassignment of items that are already included in a wave.
  Process Flow Issues: There may be issues in the process flow where the same warehouse request is being processed multiple times.
  
  Solution:
  
  Check Wave Assignment: Verify if the warehouse request and item are indeed assigned to a wave. You can do this by checking the wave management screen in EWM.
  Release the Wave: If the wave is not yet processed, you may consider releasing the wave to remove the assignment of the warehouse request or item.
  Modify the Wave: If the wave is already in process, you may need to modify the wave to include or exclude the specific warehouse request or item as needed.
  Use Different Warehouse Request: If possible, create a new warehouse request for the item instead of trying to reassign the existing one.
  Consult Documentation: Review the SAP EWM documentation for specific guidelines on wave management and handling warehouse requests.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in EWM, such as /SCWM/WAVE for wave management and /SCWM/TO for transfer orders.
  SAP Notes: Check for any SAP Notes related to this error message for potential bug fixes or updates.
  EWM Configuration: Review the configuration settings in EWM related to wave management and transfer order processing to ensure they align with your business processes.
  User Authorization: Ensure that you have the necessary authorizations to modify waves and warehouse requests in the system.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP EWM for further assistance.