How To Fix KD021 - Default rule & does not exist

KD021 - Overview

• Message type: E = Error

• Message class: KD - CO Settlement

• Message number: 021

• Message text: Default rule & does not exist

What causes this issue?

The system tried to create a <DS:GLOS.distribution_rule>distribution
rule</>. When distribution rules are generated automatically, the
system uses mostly default rules, but the default rule &V1& could not
be found.

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?

This is probably a system error. Notify your system administrator.
You may be able to circumvent the problem by enter a settlement rule
manually for this object.

Error message extract from SAP system. Copyright SAP SE.

KD021 - Details

• The SAP error message KD021 ("Default rule & does not exist") typically occurs in the context of controlling (CO) when you are trying to execute a transaction that requires a default assignment rule for cost elements or cost centers, but the system cannot find the specified default rule.
  
  Cause:
  
  Missing Default Rule: The default assignment rule that the system is trying to use does not exist in the configuration.
  Incorrect Configuration: The configuration settings for the controlling area or the specific cost element/cost center may not be set up correctly.
  Data Entry Error: There may be a typo or incorrect entry in the transaction that references the default rule.
  
  
  Solution:
  
  
  Check Configuration:
  
  Go to the configuration settings in SAP for controlling (transaction code SPRO).
  Navigate to Controlling > General Controlling > Master Data > Cost Center Accounting > Define Default Rules.
  Ensure that the default rule you are trying to use is defined and active.
  
  
  
  Create or Modify Default Rule:
  
  If