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

KZ166 - Overview

• 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.

KZ166 - Details

• 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