How To Fix RM391 - Reservation & could not be blocked: no WM material staging

SAP Error Message - Details

• Message type: E = Error

• Message class: RM - Messages for Repetitive Manufacturing

• Message number: 391

• Message text: Reservation & could not be blocked: no WM material staging

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 RM391 - Reservation & could not be blocked: no WM material staging ?

  The SAP error message RM391, which states "Reservation & could not be blocked: no WM material staging," typically occurs in the context of Warehouse Management (WM) when there is an issue with the material staging process for a reservation. This error indicates that the system is unable to block the reservation because the necessary material staging has not been set up or is not available.
  Causes:
  
  Missing Material Staging: The material that is supposed to be staged for the reservation is not available in the warehouse.
  Incorrect Configuration: The warehouse management settings may not be properly configured to allow for the staging of materials.
  Reservation Issues: The reservation itself may not be correctly set up or may not meet the necessary criteria for blocking.
  Stock Availability: There may be insufficient stock available in the warehouse to fulfill the reservation.
  Warehouse Process: The warehouse process may not be correctly defined, leading to issues in material handling.
  
  Solutions:
  
  Check Material Availability: Ensure that the material is available in the warehouse and that it is properly stocked.
  Review Reservation Details: Verify the details of the reservation to ensure that it is correctly set up and that all necessary fields are filled out.
  Configure WM Settings: Check the Warehouse Management configuration to ensure that material staging is properly set up for the relevant materials and processes.
  Stock Transfer: If stock is not available, consider transferring stock to the warehouse location where the reservation is needed.
  Check WM Documents: Review any related WM documents to ensure that they are correctly processed and that there are no outstanding issues.
  Consult SAP Notes: Look for any relevant SAP Notes or documentation that may address this specific error message or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB21 (Create Reservation), MB22 (Change Reservation), and MB23 (Display Reservation) to manage reservations effectively.
  Warehouse Management Configuration: Understanding the configuration of your WM module can help in troubleshooting issues related to material staging.
  SAP Support: If the issue persists, consider reaching out to SAP support or consulting with your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify the root cause of the RM391 error and implement the necessary solutions to resolve it.