How To Fix CN179 - No reference number has been entered for method &1 for object type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 179

• Message text: No reference number has been entered for method &1 for object type &2

What causes this issue?

A refernce number to the object to be processed has to be entered in
the method table for method &v1& of the object type &V2&

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Enter the index of the table entry for the object as the reference
number in the method table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN179 - No reference number has been entered for method &1 for object type &2 ?

  The SAP error message CN179 indicates that there is a missing reference number for a specific method associated with a particular object type in the context of project management or controlling. This error typically arises in the context of project systems (PS) or controlling (CO) modules when trying to execute a function that requires a reference number.
  Cause:
  The error occurs when:
  
  A method (like a cost method or a billing method) is being called for an object type (like a project, WBS element, or internal order) that requires a reference number, but that reference number has not been provided.
  The configuration for the object type or method may not be set up correctly, leading to the absence of a required reference number.
  
  Solution:
  To resolve the CN179 error, you can take the following steps:
  
  
  Check Input Data: Ensure that you have entered all required fields, especially the reference number for the method you are trying to use. This may involve checking the transaction or screen where the error occurred.
  
  
  Review Object Configuration: 
  
  Go to the configuration settings for the object type in question (e.g., project, WBS element, or internal order).
  Verify that the methods and their associated reference numbers are correctly configured.
  
  
  
  Consult Documentation: Review the SAP documentation or help files related to the specific method and object type to understand the requirements for the reference number.
  
  
  Transaction Codes: If applicable, use transaction codes like CJ20N (Project Builder) or KO01 (Create Order) to check the details of the project or order and ensure that all necessary information is filled out.
  
  
  Check User Authorizations: Ensure that the user has the necessary authorizations to access and modify the object type and method in question.
  
  
  Contact Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  Related Information:
  
  Object Types: Common object types that may trigger this error include WBS elements, internal orders, and projects.
  Methods: The methods referred to in the error message could relate to cost planning, billing, or other financial processes within SAP.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the CN179 error and implement a solution to resolve it.