How To Fix NAA643 - Condition type &1 is used in calc. schema &2 in an exclusion group

NAA643 - Overview

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 643

• Message text: Condition type &1 is used in calc. schema &2 in an exclusion group

What causes this issue?

Condition type &V1& is used in an exclusion group with reference to
calculation schema &V2& (usage &V3&, application &V4&).
During subsequent business volume updating, exclusion groups cannot be
taken into account correctly.

System Response

An unwanted update may take place.

How to fix this error?

Check whether the update was carried out correctly. If necessary, you
can determine the update transaction by using the analysis function.

Procedure for System Administrators

SAP urgently recommends:
If you use the subsequent business volume update, or plan to do so in
future, you should not use exclusion groups in conjunction with
condition types of subsequent settlement. The option of being able to
carry out a subsequent business volume update should be retained.
If you use exclusion groups for condition types of subsequent
settlement, you cannot use the subsequent business volume update
functions. In this case, only carry out new compilations of business
volume date.
Otherwise, there may be unwanted effects, as the system does not carry
out a price determination (due to performance reasons).
As a result, exclusion indicators, exclusion groups, and "exclusive"
indicators must not be used.

Error message extract from SAP system. Copyright SAP SE.

NAA643 - Details

• The SAP error message NAA643 indicates that a specific condition type (denoted as &1) is being used in a calculation schema (denoted as &2) that is part of an exclusion group. This typically occurs in the context of pricing or condition management in SAP, particularly in the Sales and Distribution (SD) module or the Materials Management (MM) module.
  
  Cause:
  
  Exclusion Group: The condition type is part of an exclusion group, which means that it is set up to exclude certain conditions from being applied if other conditions are met. This is often used to prevent double discounts or conflicting pricing conditions.
  Incorrect Configuration: The condition type may have been incorrectly configured to be part of an exclusion group when it should not be, or it may be conflicting with other condition types that are also part of the same group.
  Usage in Calculation Schema: The calculation schema is designed to determine how pricing is