How To Fix CN724 - An MRP-relevant reservation exists for & &

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 724

• Message text: An MRP-relevant reservation exists for & &

What causes this issue?

You are attempting to change the allocation of a component to a WBS
element.

System Response

Note that a planned order or production order may have already been
generated in material requirements planning.
If only a planned order has been generated, you just have to carry out
a new planning run to adjust the requirements accordingly.
If a production order exists, the system will not delete it. Therefore,
you must process it manually.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN724 - An MRP-relevant reservation exists for & & ?

  The SAP error message CN724 indicates that there is an MRP-relevant reservation for a specific material and plant combination. This typically occurs in the context of production planning and material requirements planning (MRP) when you are trying to perform an operation that conflicts with existing reservations.
  Cause:
  The error message CN724 is triggered when:
  
  You attempt to delete or change a reservation that is linked to an MRP process.
  There is an existing reservation for a material that is relevant for MRP, which prevents certain actions from being performed on that material.
  The reservation may be for a production order, maintenance order, or any other MRP-related document.
  
  Solution:
  To resolve the CN724 error, you can take the following steps:
  
  
  Check Existing Reservations:
  
  Use transaction code MB23 to display the existing reservations for the material in question. This will help you identify the reservation that is causing the conflict.
  
  
  
  Analyze the Reservation:
  
  Determine if the reservation is still needed. If it is not required, you can delete or modify it using transaction code MB22 (to change) or MB21 (to create a new reservation).
  
  
  
  Check MRP Settings:
  
  Ensure that the MRP settings for the material are correctly configured. This includes checking the MRP type, lot size, and other relevant parameters.
  
  
  
  Consult with Relevant Teams:
  
  If you are unsure about the implications of deleting or changing a reservation, consult with your production planning or materials management team to ensure that you are not disrupting any planned activities.
  
  
  
  Re-run MRP:
  
  After making any necessary changes to reservations, you may need to re-run the MRP process to ensure that the system reflects the latest data.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MB21: Create Reservation
  MB22: Change Reservation
  MB23: Display Reservation
  MD04: Stock/Requirements List (to see how the reservation affects stock levels)
  
  
  
  Documentation:
  
  Review SAP documentation or help files related to MRP and reservations for more detailed information on how these processes interact.
  
  
  
  User Roles:
  
  Ensure that you have the necessary authorizations to view and modify reservations in the system.
  
  
  
  By following these steps, you should be able to resolve the CN724 error and continue with your MRP-related activities in SAP.