How To Fix M7126 - Manual reservation for order category & not allowed

M7126 - Overview

• Message type: E = Error

• Message class: M7 - Inventory Management and Physical Inventory

• Message number: 126

• Message text: Manual reservation for order category & not allowed

What causes this issue?

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

System Response

The system does not accept your specification.

How to fix this error?

Enter a different account assignment, or cancel the
processing.
If required, check whether any reservations for the specified account
assignment already exist.
<DS:TRAN.MB25>Proceed</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M7126 - Manual reservation for order category & not allowed ?

  The SAP error message M7126, which states "Manual reservation for order category & not allowed," typically occurs when a user attempts to create a manual reservation for a material that is associated with an order category that does not permit manual reservations. This is often related to the configuration of the order type or the material management settings in SAP.
  
  Cause:
  
  Order Category Restrictions: The order category (e.g., production orders, maintenance orders) is configured in such a way that it does not allow manual reservations. This is often a design choice to ensure that reservations are only made through specific processes.
  Configuration Settings: The settings in the SAP system for the specific order type may not allow manual reservations. This can be due to the way the order type is set up in the system.
  Material Type Restrictions: Certain material types may have restrictions on how they can be reserved, depending on the business