How To Fix CN843 - Business areas activity & and WBS element & are not identical

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 843

• Message text: Business areas activity & and WBS element & are not identical

What causes this issue?

You have changed the business area of the activity.

System Response

A material component kept in either sales order stock or project stock
is allocated to this activity. This means that the component quantity
is tracked in the project stock for the WBS element to which the
activity is assigned. The component value is tracked in the activity.
The business areas of the activity and the WBS element must agree so
that the business area balances which the company code requires can be
created.
&WHAT_TO_DO_&
Change the business area back.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN843 - Business areas activity & and WBS element & are not identical ?

  The SAP error message CN843 indicates that there is a mismatch between the business area and the Work Breakdown Structure (WBS) element in a transaction. This error typically occurs when you are trying to post costs or create a transaction that involves both a business area and a WBS element, but they do not match in terms of their assigned business area.
  Cause:
  
  Mismatched Business Areas: The business area assigned to the cost center or internal order does not match the business area assigned to the WBS element.
  Configuration Issues: There may be configuration settings in the system that are not aligned, leading to this mismatch.
  Data Entry Errors: Incorrect data entry when assigning business areas to cost objects or WBS elements.
  
  Solution:
  
  
  Check Business Area Assignments:
  
  Verify the business area assigned to the WBS element. You can do this by navigating to the WBS element in the SAP system and checking its master data.
  Ensure that the business area assigned to the cost center or internal order matches the business area of the WBS element.
  
  
  
  Adjust Assignments:
  
  If there is a mismatch, you may need to change the business area of either the WBS element or the cost center/internal order to ensure they are identical.
  This can typically be done in the WBS element master data or the cost center configuration.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the SAP system related to business areas and WBS elements. Ensure that they are set up correctly to avoid such mismatches in the future.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific steps on how to change business area assignments or troubleshoot related issues.
  
  
  
  Testing:
  
  After making changes, perform a test transaction to ensure that the error does not occur again.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) to view and edit WBS elements, and KS03 (Display Cost Center) to check cost center details.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  User Roles: Ensure that you have the necessary authorizations to make changes to WBS elements and cost centers.
  
  By following these steps, you should be able to resolve the CN843 error and ensure that your business area and WBS element assignments are consistent.