SAP Knowledge Base Article - Preview

1518595 - M7126 Cannot Create Reservation in MB21 for an Order Category


  • Unable to create a Manual Reservation in transaction code MB21 in reference to an Order which has an Order Category, you receive an error:

Error 'M7126: Manual reservation for order category & not allowed' is issued.

  • Error M7 126 contains the following information:
    • Cause:                                                                                
      You entered an order whose category only permits automatic reservations. The following order categories do not allow manual reservations:                      
      .- 10 PP production order                                                             
      .- 20 network                                                                         
      .- 30 maintenance order                                                               
      .- 40 batch order (process manufacturing)                                             
      .- 50 inspection lot                                                                   
      What to do:                                                                           
      Enter a different account assignment, or cancel the processing.                       
      If required, check whether any reservations for the specified account assignment already exist.     



  • Materials Management (MM)
  • SAP ERP Central Component
  • SAP enhancement package for SAP ERP
  • SAP enhancement package for SAP ERP, version for SAP HANA


SAP ERP Central Component all versions ; SAP ERP all versions ; SAP S/4HANA all versions ; SAP enhancement package for SAP ERP all versions ; SAP enhancement package for SAP ERP, version for SAP HANA all versions


ECC, Manual Reservation, Order, Order Category, Created automatically, M7 126, BAPI_RESERVATION_CREATE1, K_ORDER_READ , AUFK , KBA , MM-IM-RS , Reservations , Problem

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