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

M7678 - Overview

• 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