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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MA651 - Forecast cannot be carried out using the weighting model ?

  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 may be issues with the quality of the historical data, such as missing values or inconsistencies, which can prevent the forecast from being calculated.
  
  
  Model Restrictions: The specific weighting model may have restrictions or prerequisites that are not being met, such as the need for certain characteristics or key figures.
  
  
  Solutions to Error MA651
  
  
  Check Weighting Model Configuration:
  
  Ensure that the weighting model you are trying to use is correctly defined in the system. You can check this in the configuration settings for forecasting.
  
  
  
  Review Historical Data:
  
  Verify that there is sufficient historical data available for the product or material in question. If necessary, gather more historical data to meet the requirements of the weighting model.
  
  
  
  Examine Forecast Profile Settings:
  
  Review the settings in the forecast profile to ensure they are compatible with the weighting model. Adjust any settings that may be causing conflicts.
  
  
  
  Data Cleansing:
  
  Perform data cleansing to address any quality issues in the historical data. This may involve filling in missing values, correcting inconsistencies, or removing outliers.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific requirements and limitations of the weighting model you are using. This can provide insights into any additional configurations needed.
  
  
  
  Testing with Different Models:
  
  If the issue persists, consider testing with a different forecasting model to determine if the problem is specific to the weighting model.
  
  
  
  Related Information
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to error MA651. SAP frequently updates its knowledge base with solutions to common problems.
  
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/MC90 (for planning book) or /SAPAPO/MC94 (for forecast profile) to access and modify settings.
  
  
  User Forums and Communities: Engage with SAP user communities or forums where similar issues may have been discussed. Other users may have encountered and resolved the same error.
  
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to successfully carry out the forecast using the weighting model in SAP.