How To Fix TFC0423 - Tasks cannot be scheduled on basis of task list status

SAP Error Message - Details

• Message type: E = Error

• Message class: TFC0 - Messages in FC

• Message number: 423

• Message text: Tasks cannot be scheduled on basis of task list status

What causes this issue?

Only tasks from task lists with the status <ZK>Released </>or <ZK>Active
</>can be scheduled or executed.

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?

If the task list does not have the status <ZK>Released</>, release the
task list.

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 TFC0423 - Tasks cannot be scheduled on basis of task list status ?

  The SAP error message TFC0423, which states "Tasks cannot be scheduled on basis of task list status," typically occurs in the context of production planning and scheduling within SAP. This error indicates that the system is unable to schedule tasks because the status of the task list does not allow for scheduling operations.
  Causes:
  
  Task List Status: The task list may be in a status that does not permit scheduling. For example, it could be marked as "inactive" or "not released."
  Missing Dependencies: There may be dependencies or prerequisites that have not been met, preventing the scheduling of tasks.
  Incorrect Configuration: The configuration settings for the task list or the scheduling parameters may not be set correctly.
  Locked Objects: The task list or related objects may be locked by another user or process, preventing scheduling.
  
  Solutions:
  
  
  Check Task List Status: 
  
  Navigate to the task list in question and check its status. Ensure that it is set to a status that allows scheduling (e.g., "released").
  If the task list is not released, you may need to release it to allow scheduling.
  
  
  
  Review Dependencies: 
  
  Ensure that all necessary prerequisites for the task list are met. This may include checking for required materials, resources, or other task lists.
  
  
  
  Configuration Review: 
  
  Review the configuration settings related to task lists and scheduling in your SAP system. Ensure that they are set up correctly according to your business processes.
  
  
  
  Unlock Objects: 
  
  If the task list or related objects are locked, check with your system administrator or the user who has locked the object to unlock it.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or help resources for more detailed information on task list statuses and scheduling.
  
  
  
  Error Logs: 
  
  Check the system logs for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CA01 (Create Routing), CA02 (Change Routing), or CA03 (Display Routing) to manage task lists.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to TFC0423.
  User Roles: Ensure that the user attempting to schedule tasks has the necessary authorizations to perform scheduling actions.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide further assistance.