How To Fix KQ429 - Only one costing type is allowed for reference object &

KQ429 - Overview

• Message type: E = Error

• Message class: KQ - Error Messages for Customizing Product Costing

• Message number: 429

• Message text: Only one costing type is allowed for reference object &

What causes this issue?

There is a protected costing type stored in the system for the
reference object you entered. This means it is not possible to create
new costing types for this reference object.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KQ429 - Only one costing type is allowed for reference object & ?

  The SAP error message KQ429, which states "Only one costing type is allowed for reference object &," typically occurs in the context of cost object controlling, particularly when dealing with cost estimates or cost planning in SAP.
  
  Cause:
  This error arises when there is an attempt to assign multiple costing types to a single reference object (such as a material, production order, or cost center) in a way that is not permitted by the system. In SAP, each reference object can only be associated with one costing type at a time for certain operations, such as cost estimates or planning.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Costing Type Assignment:
  
  Go to the relevant transaction (e.g., CK11N for cost estimates) and check the costing type assigned to the reference object.
  Ensure that only one costing type is assigned to the reference object in question.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the controlling area