How To Fix PR409 - Not possible to determine season indices (basic value = 0)

SAP Error Message - Details

• Message type: E = Error

• Message class: PR - Forecast: Help messages

• Message number: 409

• Message text: Not possible to determine season indices (basic value = 0)

What causes this issue?

The seasonal index could not be calculated because the basic value is
0. The basic value is 0 if the system predicts a negative pattern in
the time series.

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?

You may find that you obtain more satisfactory forecast results by
choosing a different forecast model.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PR409 - Not possible to determine season indices (basic value = 0) ?

  The SAP error message PR409 "Not possible to determine season indices (basic value = 0)" typically occurs in the context of SAP's planning and forecasting functionalities, particularly when dealing with seasonal data. This error indicates that the system is unable to calculate the seasonal indices for a given planning scenario because the basic value (the value used for calculations) is zero.
  Cause:
  
  Zero Basic Value: The primary cause of this error is that the basic value for the seasonality calculation is zero. This can happen if there are no sales or planning data available for the periods being analyzed.
  Missing Data: If the data for the relevant periods is missing or not properly maintained, the system cannot compute the seasonal indices.
  Incorrect Configuration: There may be issues with the configuration of the planning area or the settings related to seasonal indices.
  Data Aggregation Issues: If the data is aggregated incorrectly or if there are issues with the data source, it can lead to a zero basic value.
  
  Solution:
  
  Check Data Availability: Ensure that there is sufficient historical data for the periods you are trying to analyze. If there are no sales or planning values, the system will not be able to calculate seasonal indices.
  Review Planning Parameters: Check the planning parameters and ensure that they are set correctly. This includes verifying the configuration of the planning area and the settings for seasonal indices.
  Data Maintenance: If the basic value is zero due to missing data, you may need to input or correct the data in the relevant planning books or data sources.
  Run Data Consistency Checks: Use SAP tools to check for data consistency and integrity. This can help identify any issues with the data that may be causing the error.
  Consult Documentation: Review SAP documentation or help resources related to seasonal indices and planning to ensure that all necessary steps have been followed.
  Contact Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes related to planning and forecasting, such as /SAPAPO/MC90 for planning book maintenance or /SAPAPO/MC84 for planning area configuration.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the PR409 error and implement a solution to resolve it.