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

SAP Error Message - Details

• 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 to ensure that the costing types are set up correctly.
  Navigate to the configuration settings for cost accounting (transaction SPRO) and verify the settings under "Controlling" > "Cost Element Accounting" > "Define Costing Types."
  
  
  
  Adjust Costing Type:
  
  If multiple costing types are inadvertently assigned, you may need to adjust the costing type for the reference object. This may involve removing the incorrect costing type or changing the assignment to the correct one.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to cost object controlling and costing types for additional guidance on how to manage costing types effectively.
  
  
  
  Check for Customizations:
  
  If your organization has custom developments or enhancements, check if any custom logic is affecting the costing type assignment.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance, especially if this is a recurring issue or if it affects multiple users.
  
  
  
  Related Information:
  
  Costing Types: Costing types in SAP are used to differentiate between various methods of cost calculation (e.g., standard costing, planned costing).
  Reference Objects: These can include materials, production orders, or other cost objects that require cost estimation.
  Transactions: Familiarize yourself with relevant transactions such as CK11N (Create Cost Estimate), CK40N (Change Cost Estimate), and others related to cost controlling.
  
  By following these steps, you should be able to identify the cause of the KQ429 error and implement a solution to resolve it.