How To Fix CN051 - Control key not available for costs

CN051 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 051

• Message text: Control key not available for costs

What causes this issue?

The control key does not exist for the general costs activity or there
has been no indicator maintained for costs.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Check to make sure that you have entered the correct key for costs.
INCLUDE 'NA_ALLG_VORGEHEN' OBJECT DOKU ID TX
Make sure that the control key has been correctly defined. If necessary,
define an indicator for costs.

<DS:TRAN.OP67>Execute function</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.

CN051 - Details

• The SAP error message CN051 ("Control key not available for costs") typically occurs in the context of project management or controlling when you are trying to post costs to a project or internal order, and the control key associated with the operation or activity is not set up correctly or is missing.
  
  Cause:
  
  Missing Control Key: The control key that you are trying to use for the operation or activity is not defined in the system.
  Incorrect Configuration: The control key may not be assigned to the relevant order type or project type.
  Inactive Control Key: The control key might be inactive or not allowed for cost postings.
  Authorization Issues: The user may not have the necessary authorizations to use the control key.
  
  
  Solution:
  
  
  Check Control Key Configuration:
  
  Go to the transaction code OPKP (for controlling) or OPL8 (for project management) to check the configuration of control keys.
  Ensure that the control key you are trying to use is