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

RY830 - Overview

• 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.

Unfortunately, there isn't any extra information in this error notice.

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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