How To Fix CJ161 - Activity cannot be scheduled. Control key does not allow scheduling

SAP Error Message - Details

• Message type: E = Error

• Message class: CJ - Project master data and structure

• Message number: 161

• Message text: Activity cannot be scheduled. Control key does not allow scheduling

What causes this issue?

The activity was not scheduled because the control key for this
activity does not permit scheduling.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

On the detail screen for the activity, enter a control key that allows
scheduling.
You can change the control key itself in Customizing for the Project
System.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CJ161 - Activity cannot be scheduled. Control key does not allow scheduling ?

  The SAP error message CJ161, which states "Activity cannot be scheduled. Control key does not allow scheduling," typically occurs in the context of project management within SAP, particularly when dealing with project activities in the Project System (PS) module. This error indicates that the control key assigned to the activity does not permit scheduling.
  Cause:
  The primary causes of this error include:
  
  
  Control Key Settings: The control key assigned to the activity does not allow for scheduling. Control keys define how activities are processed and can restrict certain functionalities, including scheduling.
  
  
  Activity Type: The activity type associated with the control key may not be set up to allow scheduling.
  
  
  Project Structure: The project structure or hierarchy may have restrictions that prevent scheduling for certain activities.
  
  
  Missing Parameters: Required parameters for scheduling may not be set up correctly in the project or activity.
  
  
  Solution:
  To resolve the CJ161 error, you can take the following steps:
  
  
  Check Control Key:
  
  Go to the activity in the project and check the control key assigned to it.
  Use transaction code OIA1 to view and modify control key settings.
  Ensure that the control key allows for scheduling. Look for options like "Scheduling allowed" or similar settings.
  
  
  
  Modify Control Key:
  
  If the control key does not allow scheduling, you may need to change it to a different control key that does permit scheduling.
  You can do this by editing the activity in the project and selecting a different control key.
  
  
  
  Review Activity Type:
  
  Check the activity type associated with the control key to ensure it is configured correctly for scheduling.
  
  
  
  Check Project Settings:
  
  Review the overall project settings to ensure there are no restrictions on scheduling activities.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details on control key configurations and their implications on scheduling.
  
  
  
  Testing:
  
  After making changes, attempt to schedule the activity again to see if the error persists.
  
  
  
  Related Information:
  
  Control Key Configuration: Control keys can be configured in the SAP system to define various behaviors for project activities. Common control keys include "N" (No scheduling), "P" (Planning), and others that may allow or restrict scheduling.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) for managing project activities and OIA1 for control key settings.
  SAP Notes: Check SAP Notes for any known issues or updates related to the CJ161 error message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to allow scheduling for the affected activity.