How To Fix ARUN_MAIN103 - Item &1 is reserved and will be unassigned.

ARUN_MAIN103 - Overview

• Message type: E = Error

• Message class: ARUN_MAIN -

• Message number: 103

• Message text: Item &1 is reserved and will be unassigned.

What causes this issue?

The material is relevant to Supply Assignment (ARun) and an assignment
exists for this document item. You have not defined a rule to unassign
orders for an application type in the Customizing activity under
<LS>Cross-Application Components > Advanced Available-to-Promise (aATP)
> Supply Assignment (ARun) > Cross-Applications</>.
If you have not defined a rule to unassign an order, then the orders
will be unassigned automatically.

System Response

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

How to fix this error?

Define rules to unassign orders for an application type in the
Customizing activities under <LS>Cross-Application Components > Advanced
Available-to-Promise (aATP) > Supply Assignment (ARun) >
Cross-Applications</>.
By defining a rule to unassign orders, you specify exactly how the
system should react when an application type is modified (for example,
change in requirement date, goods receipt date, plant, storage location,
and so on).
You set the appropriate fields listed in the application type in
Customizing. For field checks, you can assign one of the following
options:
N,,No Action
W,,Warnings Before an Order Is Unassigned
E,,Changes Not Permitted
Depending on the selected parameter, the system decides how and when the
quantities should be unassigned.

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 ARUN_MAIN103 - Item &1 is reserved and will be unassigned. ?

  The SAP error message ARUN_MAIN103 indicates that a specific item (denoted by &1) is reserved and cannot be processed in the current context. This typically occurs in scenarios involving inventory management, order processing, or similar functions where items are reserved for specific purposes (e.g., for a customer order, production order, etc.).
  
  Cause:
  
  Item Reservation: The item in question has been reserved for a specific purpose, such as a sales order or production order. This means that the item is not available for other transactions until the reservation is released.
  System Configuration: There may be specific settings in the SAP system that enforce item reservations for certain processes.
  Transaction Context: The error may arise when trying to perform an action that conflicts with the reservation status of the item.
  
  
  Solution:
  
  
  Check Item Reservation: 
  
  Use transaction codes like MB22 (Change Reservation) or MB23 (Display Reservation) to check if the item is indeed reserved and for which purpose.
  If the