How To Fix BRAIN_DEV645 - Query contains non-cumulative key figures and incompatible formulas

BRAIN_DEV645 - Overview

• Message type: E = Error

• Message class: BRAIN_DEV - BRAIN messages (for use by development)

• Message number: 645

• Message text: Query contains non-cumulative key figures and incompatible formulas

What causes this issue?

The query contains non-cumulative key figures and exception aggregated
formulas. These formulas contain constants or variables with replacement
path from an attribute.
During non-cumulative processing, non-cumulative key figure values are
calculated for time periods for which there need not be any postings in
the posted data. In order to calculate values like this, the time
reference of the posted data is changed. If a characteristic value of
any characteristic is now not posted within the requested time period,
it might still be projected into the requested time period by
non-cumulative processing.
If a variable with replacement path from an attribute is defined on
characteristic M, or if characteristic M is a reference characteristic
for a formula that contains a constant with its own data representation
(for example <NP>SUM(1) over M</> ), the result depends on whether or
not the query contains a non-cumulative key figure in addition to this
formula.
Example
booked data
M,,CALDAY,,Delta of non-cumulative key figure
a,,01.03.2013,,5
a,,02.03.2013,,17
b,,05.03.2013,,19
In a query with filter on 5.03.2013 the result of <NP>SUM(1) over M</>
is 1.
Calculated non-cumulative values for 5.03.2013
M,,CALDAY,,Calculated non-cumulative key figure
a,,05.03.2013,,22
b,,05.03.2013,,19
In a query with filter on 5.03.2013 the result of <NP>SUM(1) over M</>
is 2.

System Response

The system behaves for queries as described above.

How to fix this error?

If a formula <NP>SUM(1) over calday</> should always count the days
resulting from non-cumulative processing, it is more precise and safe to
use a formula <NP>COUNT(non-cumulative keyfigure) over calday</>
instead.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

BRAIN_DEV645 - Details

• The SAP error message BRAIN_DEV645 indicates that there is an issue with the query you are trying to execute in SAP BW (Business Warehouse) or SAP BW/4HANA. Specifically, this error arises when the query contains non-cumulative key figures and incompatible formulas. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  
  Non-Cumulative Key Figures: Non-cumulative key figures are those that do not accumulate over time, such as averages or ratios. They are calculated based on specific conditions and do not sum up like cumulative key figures (e.g., sales revenue).
  
  
  Incompatible Formulas: The error can occur if the query includes formulas that are not compatible with non-cumulative key figures. For example, trying to sum or aggregate non-cumulative key figures in a way that assumes they can be treated like cumulative key figures.
  
  
  Solutions:
  
  
  Review Key Figures: Check the key figures used in your query. Ensure that you are not mixing cumulative and non-cumulative key