How To Fix RY830 - Unable to save the results; sigma < 0

SAP Error Message - Details

• Message type: E = Error

• Message class: RY - Messages for RM Basis

• Message number: 830

• Message text: Unable to save the results; sigma < 0

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RY830 - Unable to save the results; sigma < 0 ?

  The SAP error message RY830, which states "Unable to save the results; sigma < 0," typically occurs in the context of statistical calculations or analyses within SAP, particularly in the SAP Quality Management (QM) module or during the execution of certain reports or evaluations.
  Cause:
  The error message indicates that there is an issue with the statistical calculations being performed, specifically that the calculated value for "sigma" (which represents the standard deviation in statistical terms) is less than zero. This situation can arise due to several reasons, including:
  
  Data Quality Issues: The data being analyzed may contain invalid or erroneous entries, leading to incorrect calculations.
  Insufficient Data: There may not be enough data points to perform a valid statistical analysis, resulting in a negative standard deviation.
  Configuration Issues: Incorrect settings or configurations in the statistical analysis parameters may lead to this error.
  Calculation Errors: There may be a bug or error in the calculation logic within the SAP system.
  
  Solution:
  To resolve the RY830 error, you can take the following steps:
  
  
  Check Data Quality:
  
  Review the data being used for the analysis. Ensure that there are no missing, invalid, or outlier values that could affect the calculations.
  Clean the data if necessary, removing or correcting any problematic entries.
  
  
  
  Verify Data Sufficiency:
  
  Ensure that there are enough data points for the statistical analysis. If the dataset is too small, consider adding more relevant data.
  
  
  
  Review Configuration Settings:
  
  Check the configuration settings related to the statistical analysis in SAP. Ensure that all parameters are set correctly and that they align with the intended analysis.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for guidance on the specific statistical functions being used. This may provide insights into common issues and their resolutions.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you may want to trace the calculations leading to the error to identify the root cause.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for assistance. They may have additional insights or patches available for known issues.
  
  
  
  Related Information:
  
  Statistical Analysis in SAP: Understanding how SAP performs statistical calculations can help in troubleshooting issues related to data analysis.
  SAP Quality Management (QM): Familiarity with the QM module and its functionalities can provide context for where this error might occur.
  SAP Notes and Knowledge Base: Searching for the specific error message in the SAP Notes or Knowledge Base can yield additional solutions or workarounds provided by SAP.
  
  By following these steps, you should be able to identify and resolve the underlying issue causing the RY830 error in SAP.