How To Fix QS138 - Select a class midpoint that is smaller than the upper plausibility limit

SAP Error Message - Details

• Message type: E = Error

• Message class: QS - QM: Master data

• Message number: 138

• Message text: Select a class midpoint that is smaller than the upper plausibility limit

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message QS138 - Select a class midpoint that is smaller than the upper plausibility limit ?

  The SAP error message QS138, which states "Select a class midpoint that is smaller than the upper plausibility limit," typically occurs in the context of quality management and statistical process control within SAP. This error is related to the configuration of quality inspection characteristics, particularly when defining class intervals for measurement values.
  Cause:
  The error arises when you are trying to set a class midpoint for a quality characteristic that exceeds the defined upper plausibility limit. The plausibility limits are set to ensure that the values being measured fall within a reasonable range, and the midpoint must logically fall within the defined limits.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Upper Plausibility Limit: Review the upper plausibility limit set for the quality characteristic in question. Ensure that it is correctly defined and reflects the expected range of values.
  
  
  Adjust the Class Midpoint: Modify the class midpoint to ensure it is less than the upper plausibility limit. The midpoint should be a value that logically fits within the defined limits.
  
  
  Review Class Intervals: If you are working with multiple class intervals, ensure that all class midpoints are correctly defined and that they do not exceed the upper plausibility limit.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on setting up quality characteristics and plausibility limits.
  
  
  Test Changes: After making adjustments, test the changes by attempting to save or process the quality characteristic again to ensure that the error no longer occurs.
  
  
  Related Information:
  
  Quality Management (QM) Module: This error is specific to the QM module in SAP, which deals with quality planning, inspection, and control.
  Plausibility Limits: These limits are critical for ensuring that the data collected during quality inspections is valid and reliable.
  SAP Notes and Support: If the issue persists, consider checking SAP Notes for any known issues or patches related to this error message. You can also reach out to SAP support for further assistance.
  
  By following these steps, you should be able to resolve the QS138 error and continue with your quality management processes in SAP.