How To Fix RSAN_RT324 - Coefficient of determination r^2 = &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAN_RT - Messages for Runtime Analysis

• Message number: 324

• Message text: Coefficient of determination r^2 = &1

What causes this issue?

The coefficient of determination expresses the relationship between the
declared variation of the estimation with the overall variation. The
value range is between 0 and 1. For more precise information, consult
statistics textbooks.

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?

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 RSAN_RT324 - Coefficient of determination r^2 = &1 ?

  The SAP error message RSAN_RT324, which indicates "Coefficient of determination r^2 = &1," typically arises in the context of SAP BW (Business Warehouse) or SAP HANA when dealing with statistical analyses or regression models. The coefficient of determination, denoted as r², is a statistical measure that represents the proportion of variance for a dependent variable that's explained by an independent variable or variables in a regression model.
  Cause:
  The error message RSAN_RT324 usually occurs when the calculated r² value is either not valid or falls outside the expected range (0 to 1). This can happen due to several reasons, including:
  
  Insufficient Data: The dataset used for the regression analysis may not have enough data points to produce a reliable r² value.
  Poor Model Fit: The model may not fit the data well, leading to an r² value that is not meaningful.
  Data Quality Issues: There may be issues with the data quality, such as missing values, outliers, or incorrect data types.
  Incorrect Configuration: The settings or parameters used in the analysis may be incorrectly configured.
  
  Solution:
  To resolve the RSAN_RT324 error, consider the following steps:
  
  
  Check Data Quality:
  
  Ensure that the dataset used for the analysis is clean and free from missing values or outliers.
  Validate the data types of the fields being used in the regression analysis.
  
  
  
  Increase Data Volume:
  
  If possible, increase the number of data points in your dataset to improve the reliability of the regression analysis.
  
  
  
  Review Model Configuration:
  
  Check the configuration settings for the regression model to ensure they are set correctly.
  Make sure that the independent and dependent variables are appropriately defined.
  
  
  
  Analyze Model Fit:
  
  Review the model fit and consider using different variables or a different modeling approach if the current model does not fit well.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or support resources for specific guidance related to the statistical functions you are using.
  
  
  
  Seek Expert Help:
  
  If the issue persists, consider reaching out to SAP support or a data analyst with experience in SAP BW or HANA for further assistance.
  
  
  
  Related Information:
  
  Coefficient of Determination (r²): A value between 0 and 1, where 0 indicates that the model does not explain any of the variability of the response data around its mean, and 1 indicates that it explains all the variability.
  Regression Analysis: A statistical method used to model the relationship between a dependent variable and one or more independent variables.
  SAP BW and HANA: SAP Business Warehouse (BW) is a data warehousing solution, while SAP HANA is an in-memory database and application development platform.
  
  By following these steps, you should be able to diagnose and resolve the RSAN_RT324 error effectively.