How To Fix KPN029 - There is already a unit costing for activity &

SAP Error Message - Details

• Message type: E = Error

• Message class: KPN - Costing: Networks, Projects

• Message number: 029

• Message text: There is already a unit costing for activity &

What causes this issue?

There is already an invoicing plan for activity &V1&. You cannot create
a unit costing and an invoicing plan simultaneously for an activity.

System Response

You cannot create the invoicing plan.

How to fix this error?

Delete the unit costing if you do not require it any more. You can then
create the invoicing plan.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KPN029 - There is already a unit costing for activity & ?

  The SAP error message KPN029, which states "There is already a unit costing for activity &," typically occurs in the context of cost planning and activity-based costing within SAP. This error indicates that there is already an existing unit cost for the specified activity, and the system does not allow for the creation of a duplicate entry.
  Cause:
  
  Duplicate Entry: The most common cause of this error is an attempt to create a new unit cost for an activity that already has a unit cost defined in the system.
  Incorrect Data Entry: There may be a mistake in the data entry process, such as trying to enter a cost for an activity that has already been defined.
  Configuration Issues: There might be issues with the configuration settings in the controlling (CO) module that prevent the creation of new cost entries.
  
  Solution:
  
  Check Existing Costs: Before attempting to create a new unit cost, check the existing unit costs for the activity in question. You can do this by navigating to the relevant cost planning transaction (e.g., KP06 for cost center planning) and reviewing the existing entries.
  Modify Existing Cost: If you need to update the unit cost, you can modify the existing entry instead of creating a new one. This can usually be done in the same transaction where you would create a new cost.
  Delete Duplicate Entry: If you find that there is an unnecessary duplicate entry, you may delete it if it is appropriate to do so.
  Consult Documentation: Review SAP documentation or help files related to cost planning and activity-based costing for additional guidance on managing unit costs.
  Check Configuration: If the issue persists, consult with your SAP configuration team to ensure that the settings for cost planning are correctly configured and that there are no restrictions preventing the entry of new costs.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KP06 (Cost Center Planning), KP26 (Activity Type Planning), and KSU5 (Cost Object Planning) to manage costs effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its system, and there may be specific notes addressing this error.
  User Authorization: Ensure that you have the necessary authorizations to create or modify unit costs in the system. Lack of proper permissions can sometimes lead to unexpected errors.
  
  If the problem continues after following these steps, it may be beneficial to reach out to your SAP support team or consult with an SAP expert for further assistance.