How To Fix KQ312 - Maintenance after deactivating &1 makes cost estimates incomparable

KQ312 - Overview

• Message type: E = Error

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

• Message number: 312

• Message text: Maintenance after deactivating &1 makes cost estimates incomparable

What causes this issue?

If cost estimates for cost component structure &v1& have been saved,
the following actions will result in a structure break in the update of
the cost component splits (cost component itemization):

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

Changing cost components
Deleting cost components
Deleting cost component structures
Changing the assignment of cost elements to the cost components
Changing the assignment of the cost component structure to the
organizational units
Changing the transfer structure
Cost estimates updated before the change will then no longer be
comparable with cost estimates updated after the change.

How to fix this error?

You can create new cost components for a cost component structure or
change cost components from "variable" to "fixed and variable" without
restrictions.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KQ312 - Maintenance after deactivating &1 makes cost estimates incomparable ?

  The SAP error message KQ312 indicates that there is an issue with cost estimates in the system after deactivating a particular maintenance activity or function. This error typically arises in the context of cost accounting and controlling, particularly when dealing with cost estimates for materials or production processes.
  
  Cause:
  The error message KQ312 is triggered when a cost estimate is being compared or processed after a maintenance activity has been deactivated. This can happen for several reasons:
  
  Deactivation of Costing Variants: If a costing variant or a specific costing method has been deactivated, any cost estimates that were created using that variant may become invalid or incomparable.
  Changes in Master Data: Changes in the master data (like material master, BOM, routing, etc.) that affect cost estimates can lead to this error if the relevant data is no longer available or has been altered.
  Inconsistent Costing Data: If there are inconsistencies in the costing data due