How To Fix IM496 - Order type with external number assignment not allowed

IM496 - Overview

• Message type: E = Error

• Message class: IM - Maintenance notifications

• Message number: 496

• Message text: Order type with external number assignment not allowed

What causes this issue?

You want to create an order directly from the notification. However, you
have chosen an order type that requires external number assignment.

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

System Response

The system will not allow you to make an entry here.

How to fix this error?

Choose an order type that allows internal number assignment.

Error message extract from SAP system. Copyright SAP SE.

IM496 - Details

• The SAP error message IM496 ("Order type with external number assignment not allowed") typically occurs when you are trying to create an order using a specific order type that is configured to use internal number assignment, but you are attempting to assign an external number to it. This can happen in various modules, such as Production Planning (PP), Plant Maintenance (PM), or Project System (PS).
  
  Cause:
  
  Order Type Configuration: The order type you are using is set up in the system to use internal number assignment. This means that the system automatically generates the order number when an order is created.
  External Number Assignment Attempt: You are trying to manually enter an order number or use a number that is not generated by the system, which is not allowed for that specific order type.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Order Type Configuration:
  
  Go to the configuration settings for the order