How To Fix RSDHA813 - Smoothing constant gamma is out of range (0 < gamma < 1)

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDHA - HANA Analysis in BW

• Message number: 813

• Message text: Smoothing constant gamma is out of range (0 < gamma < 1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDHA813 - Smoothing constant gamma is out of range (0 < gamma < 1) ?

  The SAP error message RSDHA813 indicates that there is an issue with the smoothing constant gamma in the context of time series forecasting or data analysis within SAP BW (Business Warehouse) or SAP Analytics. The error specifies that the value of gamma must be between 0 and 1 (exclusive), meaning it cannot be equal to 0 or 1.
  Cause:
  The error occurs when the gamma value provided in the configuration for a forecasting model or time series analysis is either:
  
  Less than or equal to 0
  Greater than or equal to 1
  
  This can happen due to:
  
  Incorrect manual input of the gamma value.
  Default settings that have not been properly configured.
  Data import or extraction processes that have not validated the gamma value.
  
  Solution:
  To resolve the error, you should take the following steps:
  
  
  Check the Gamma Value:
  
  Review the configuration settings for the forecasting model or time series analysis where the gamma value is defined.
  Ensure that the gamma value is set to a valid number between 0 and 1 (exclusive). For example, a common choice might be 0.1, 0.2, etc.
  
  
  
  Update the Configuration:
  
  If you find that the gamma value is incorrect, update it to a valid value.
  Save the changes and re-run the process that triggered the error.
  
  
  
  Validate Input Data:
  
  If the gamma value is being derived from input data, ensure that the data is clean and correctly formatted.
  Check for any data transformation processes that might inadvertently set the gamma value outside the acceptable range.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on setting up forecasting models and the implications of the gamma value.
  
  
  
  Testing:
  
  After making changes, test the forecasting model or analysis to ensure that the error is resolved and that the results are as expected.
  
  
  
  Related Information:
  
  Gamma in Time Series Analysis: In the context of exponential smoothing, gamma is a parameter that controls the rate of smoothing applied to the data. A value close to 0 gives more weight to recent observations, while a value close to 1 gives more weight to historical data.
  SAP BW/4HANA: If you are using SAP BW/4HANA or any other version, ensure that you are familiar with the specific forecasting algorithms and their parameters.
  Error Handling: Implement error handling in your data processing workflows to catch and log such errors for easier troubleshooting in the future.
  
  By following these steps, you should be able to resolve the RSDHA813 error and successfully configure your forecasting model.