How To Fix CN855 - Cost control keys are not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 855

• Message text: Cost control keys are not allowed

What causes this issue?

You have entered a cost control key for the activity. However, cost
control keys are only valid for general costs activities.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Enter a different control key for the activity.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN855 - Cost control keys are not allowed ?

  The SAP error message CN855 ("Cost control keys are not allowed") typically occurs in the context of project management and controlling within SAP, particularly when dealing with cost planning or budgeting for projects. This error indicates that the system has encountered a cost control key that is not permitted in the current context.
  Causes:
  
  Invalid Cost Control Key: The cost control key being used may not be defined or allowed for the specific project or activity type.
  Configuration Issues: The configuration settings in the controlling area or project definition may not allow the use of certain cost control keys.
  Project Status: The project or WBS element may be in a status that does not permit the use of cost control keys.
  Authorization Issues: The user may not have the necessary authorizations to use certain cost control keys.
  
  Solutions:
  
  Check Cost Control Key: Verify that the cost control key you are trying to use is valid and correctly defined in the system. You can do this by checking the configuration in the controlling area.
  Review Project Configuration: Ensure that the project or WBS element is configured to allow the use of the specified cost control key. This may involve checking the project definition and settings.
  Change Project Status: If the project is in a status that restricts the use of cost control keys, consider changing the status to one that allows it.
  Authorization Check: Ensure that the user has the necessary authorizations to use the cost control key. This may involve checking user roles and permissions in the SAP system.
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the cost control keys and their allowed usage.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CJ20N (Project Builder) or CJ02 (Change Project) to review and modify project settings.
  Configuration Path: The configuration for cost control keys can typically be found in the SAP IMG under:
  
  Controlling (CO) -> Project System -> Planning -> Cost Planning -> Define Cost Control Keys.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues or bugs related to cost control keys.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in SAP Project System (PS) and Controlling (CO) modules.