How To Fix CN306 - Cannot change actual date; activity/element & not (finally) confirmed

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 306

• Message text: Cannot change actual date; activity/element & not (finally) confirmed

What causes this issue?

The activity or the activity element has not been confirmed, neither
partially or finally.

System Response

The actual dates and times cannot be changed..

How to fix this error?

Create a confirmation for the activity or activity element

Procedure for System Administrators

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN306 - Cannot change actual date; activity/element & not (finally) confirmed ?

  The SAP error message CN306 indicates that you are trying to change the actual date of an activity or element that has not been finally confirmed. This typically occurs in the context of project management and controlling within SAP, particularly when dealing with network activities in Project System (PS) or production orders in Controlling (CO).
  Cause:
  
  Activity Not Finally Confirmed: The activity or element you are trying to change has not been marked as finally confirmed. In SAP, once an activity is finally confirmed, certain changes to its actual dates are restricted to maintain data integrity.
  Status of the Activity: The status of the activity may not allow changes to the actual dates. For example, if the activity is in a status that prevents changes, you will encounter this error.
  System Settings: There may be system settings or configurations that restrict changes to actual dates for certain types of activities or elements.
  
  Solution:
  
  Confirm the Activity: If you need to change the actual date, you may first need to confirm the activity. You can do this by navigating to the relevant transaction (e.g., CN25 for confirming activities) and confirming the activity.
  Check Activity Status: Review the status of the activity. If it is in a status that does not allow changes, you may need to change the status or consult with your project manager or system administrator.
  Use the Correct Transaction: Ensure you are using the correct transaction for making changes. For example, if you are trying to change dates in a project, use the appropriate project management transaction.
  Consult Documentation: Review SAP documentation or help files related to project management and activity confirmation for additional guidance on handling this error.
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide assistance based on your specific configuration and requirements.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN21 (Create Network), CN22 (Change Network), CN25 (Confirm Activities), and others that may be relevant to your task.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the activity or element in question.
  
  By following these steps, you should be able to address the CN306 error and proceed with your project management tasks in SAP.