How To Fix MA651 - Forecast cannot be carried out using the weighting model

MA651 - Overview

• Message type: E = Error

• Message class: MA - Sales and Operations Planning

• Message number: 651

• Message text: Forecast cannot be carried out using the weighting model

What causes this issue?

The weighting model can only be carried out if the forecast weighting
factors exist.
The error message can be caused by several things:
In consistent planning, the forecast weighting model cannot be executed
online at totals level. This is because no forecast weighting factors
exist for the totals level.
The forecast weighting factors have not been maintained for the
planning object selected.
There is no refereence to the forecast weighting factors in the
forecast tables.

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

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

MA651 - Details

• The SAP error message MA651, which states "Forecast cannot be carried out using the weighting model," typically occurs in the context of demand planning and forecasting within SAP's Advanced Planning and Optimization (APO) or similar modules. This error indicates that the system is unable to generate a forecast using the specified weighting model due to certain conditions not being met.
  Causes of Error MA651
  
  
  Missing Weighting Model Configuration: The weighting model that you are trying to use may not be properly configured or may not exist in the system.
  
  
  Insufficient Historical Data: The system may require a certain amount of historical data to apply the weighting model effectively. If there is not enough data, the forecast cannot be generated.
  
  
  Incorrect Settings in Forecast Profile: The forecast profile settings may not be compatible with the weighting model being used. This includes settings related to the forecast method, data selection, or other parameters.
  
  
  Data Quality Issues: There