How To Fix IW009 - Changes to object class not allowed

IW009 - Overview

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 009

• Message text: Changes to object class not allowed

What causes this issue?

You are trying to change the object class for the
<GL:maintenance_order>maintenance order</>.

System Response

The system will not allow you to change the object class as postings
have already been made to the order.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.

IW009 - Details

• The SAP error message IW009 ("Changes to object class not allowed") typically occurs in the context of maintenance orders or work orders when there is an attempt to change certain attributes of an object class that are not permitted. This can happen in various scenarios, such as when trying to modify a work order that is already in a certain status or when the object class is locked for changes.
  Causes:
  
  Status of the Order: The work order may be in a status that does not allow changes (e.g., completed, closed, or technically completed).
  Object Class Restrictions: The object class associated with the order may have restrictions that prevent changes to certain fields or attributes.
  Authorization Issues: The user may not have the necessary authorizations to make changes to the object class.
  System Configuration: Certain configurations in the SAP system may restrict changes to specific object classes.
  
  Solutions:
  
  Check Order Status: Verify the status of the work