How To Fix KU403 - Classification for the projects is currently blocked

KU403 - Overview

• Message type: E = Error

• Message class: KU - Costing: Rollup

• Message number: 403

• Message text: Classification for the projects is currently blocked

What causes this issue?

A project object is to be created or changed, and classified at the
same time. The project object is assigned to class <ZH>SAP_KKR_CLASS</>
(class type 014).
However, the entire class is currently locked.

System Response

The project object cannot be created or changed while the transaction
that caused the lock is still running.

How to fix this error?

Wait until the transaction is finished. Transactions that lock the
class for extended periods of time should not be run during normal
online operation.
You can find out who is locking the class with transaction SM12:
Search for locks for table KSSKX. In the subsequent list, search for
lock argument <ZH>014SAP_KKR_CLASS</>.

Error message extract from SAP system. Copyright SAP SE.

KU403 - Details

• The SAP error message KU403, which states "Classification for the projects is currently blocked," typically occurs in the context of project management and classification in SAP. This error indicates that the classification system for the project is not available for use, which can hinder project-related activities.
  Causes:
  
  Project Status: The project may be in a status that does not allow classification changes. For example, if the project is completed or archived, classification might be blocked.
  Authorization Issues: The user may not have the necessary authorizations to perform classification activities on the project.
  System Configuration: There may be configuration settings in the SAP system that restrict classification for certain project types or statuses.
  Locking Mechanism: The project might be locked by another user or process, preventing any changes to its classification.
  Technical Issues: There could be underlying technical issues or bugs in the SAP system that are causing the classification to be blocked.
  
  Solutions:
  
  Check Project Status: Verify the