How To Fix KZ166 - Assignment of single object to cost object &v1& not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: KZ - Cost Object Repetitive Mfg / Process Mfg

• Message number: 166

• Message text: Assignment of single object to cost object &v1& not allowed

What causes this issue?

<DS:GLOS.cost_object_ID>Cost object ID</> &v1& has the
<DS:GLOS.cost_object_category>cost object category</> &v2& for which
the assignment of the single object is set.

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?

Do one of the following:
Assign a different single object to cost object &v1
Assign the single object to a cost object with a cost object category
that allows such an assignment
Change the setting for cost object category &v2& so that the assignment
of the single object is allowed

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KZ166 - Assignment of single object to cost object &v1& not allowed ?

  The SAP error message KZ166, which states "Assignment of single object to cost object &v1& not allowed," typically occurs in the context of cost accounting when there is an attempt to assign a single object (like a cost center, internal order, or project) to a cost object that does not allow such an assignment.
  Cause:
  
  Incorrect Assignment Type: The error often arises when trying to assign a single object to a cost object that is not configured to accept it. For example, certain cost objects may only accept multiple assignments or may have restrictions based on their configuration.
  Cost Object Configuration: The cost object (like a cost center or internal order) may be set up in a way that does not allow for the assignment of single objects. This could be due to settings in the controlling area or the specific cost object type.
  Master Data Issues: There may be issues with the master data of the cost object or the single object being assigned, such as missing or incorrect information.
  
  Solution:
  
  Check Configuration: Review the configuration of the cost object in question. Ensure that it is set up to allow the assignment of single objects. This may involve checking the settings in the controlling area or the specific cost object type.
  Review Assignment Rules: Look into the assignment rules for the cost object. Ensure that the type of assignment you are trying to make is permitted.
  Correct Master Data: Verify the master data for both the cost object and the single object. Ensure that all required fields are filled out correctly and that there are no inconsistencies.
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the cost object types and their assignment rules.
  Seek Help from SAP Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like KS01 (Create Cost Center), KO01 (Create Internal Order), or CJ01 (Create Project) to check or modify the relevant master data.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to cost objects and their assignments.
  
  By following these steps, you should be able to identify the cause of the KZ166 error and implement a solution to resolve it.