How To Fix CNACL_MSG_CL023 - You must activate ACL to assign activity & to this object

SAP Error Message - Details

• Message type: E = Error

• Message class: CNACL_MSG_CL - Message class for ACL FOR PS

• Message number: 023

• Message text: You must activate ACL to assign activity & to this object

What causes this issue?

A network or an activity for which the Access Control List (ACL) is not
activated cannot be assigned to an object which is ACL-enabled.

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?

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 CNACL_MSG_CL023 - You must activate ACL to assign activity & to this object ?

  The SAP error message CNACL_MSG_CL023 indicates that you need to activate the Activity Control List (ACL) in order to assign a specific activity to an object. This error typically arises in the context of controlling and project management modules within SAP, particularly when dealing with activities in project structures.
  Cause:
  The error occurs because the Activity Control List (ACL) feature is not activated for the project or controlling area you are working with. The ACL is a mechanism that allows for the assignment of activities to objects, and if it is not activated, the system will prevent you from making such assignments.
  Solution:
  To resolve this error, you need to activate the Activity Control List (ACL) for the relevant project or controlling area. Here are the steps to do this:
  
  
  Access the Configuration Settings:
  
  Go to the SAP Easy Access screen.
  Navigate to the following path: 
  SPRO -> SAP Reference IMG -> Controlling -> Project System -> Structures -> Define Control Parameters for Project
  
  
  
  
  Activate Activity Control List:
  
  In the configuration settings, look for the option related to the Activity Control List.
  Ensure that the option to activate the ACL is checked or enabled.
  
  
  
  Save Changes:
  
  After making the necessary changes, save your configuration.
  
  
  
  Re-attempt the Assignment:
  
  Go back to the transaction or process where you encountered the error and try to assign the activity again.
  
  
  
  Related Information:
  
  Authorization: Ensure that you have the necessary authorizations to make changes to the configuration settings.
  Documentation: Refer to SAP documentation or help files for more detailed information on Activity Control Lists and their configuration.
  Support: If you continue to experience issues, consider reaching out to your SAP support team or consulting with an SAP expert who can provide further assistance.
  
  By following these steps, you should be able to resolve the CNACL_MSG_CL023 error and successfully assign activities to your objects in SAP.