How To Fix M7678 - Not possible to add and change reservation items at the same time

SAP Error Message - Details

• Message type: E = Error

• Message class: M7 - Inventory Management and Physical Inventory

• Message number: 678

• Message text: Not possible to add and change reservation items at the same time

What causes this issue?

It is not possible to change and add reservation items at the same time
with the <DS:GLOS.3526B543AFAB52B9E10000009B38F974>BAPI</>
<DS:FU.BAPI_RESERVATION_CHANGE>BAPI_RESERVATION_CHANGE</>.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

You call the BAPI for each activity individually, so that the check
result is correct during the optional
<DS:GLOS.3FFC8091B6F6D311A4910060B03C3B0E>ATP check.</>

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M7678 - Not possible to add and change reservation items at the same time ?

  The SAP error message M7678, which states "Not possible to add and change reservation items at the same time," typically occurs when there is an attempt to modify a reservation in a way that conflicts with the system's rules regarding item management. This error is often encountered in the context of inventory management and material requirements planning.
  Cause:
  The error arises when a user tries to perform two conflicting actions on a reservation item simultaneously. Specifically, it occurs when:
  
  You are trying to add new items to a reservation while also attempting to change existing items in the same reservation.
  The system does not allow simultaneous addition and modification of items in a single transaction to maintain data integrity.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Separate Actions: Ensure that you are either adding new items or changing existing items, but not both at the same time. 
  
  If you need to add items, do so in one transaction and save it.
  After successfully adding the items, you can then proceed to change the existing items in a separate transaction.
  
  
  
  Check Reservation Type: Verify the type of reservation you are working with. Some reservation types may have specific restrictions on modifications.
  
  
  Review User Permissions: Ensure that you have the necessary permissions to make changes to reservations. Sometimes, restrictions can be due to user roles.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines related to the transaction you are performing.
  
  
  Transaction Codes: If you are using a specific transaction code (like MB21 for creating reservations), ensure you are following the correct process for that transaction.
  
  
  System Configuration: If the issue persists, it may be worth checking with your SAP Basis or technical team to see if there are any configuration settings that might be affecting the behavior of reservations.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB21 (Create Reservation), MB22 (Change Reservation), and MB23 (Display Reservation).
  User Training: Ensure that users are trained on the correct procedures for managing reservations to avoid this error in the future.
  
  By following these steps, you should be able to resolve the M7678 error and manage your reservations effectively in SAP.