How To Fix QS121 - Enter a validity time period for the tolerance change

QS121 - Overview

• Message type: E = Error

• Message class: QS - QM: Master data

• Message number: 121

• Message text: Enter a validity time period for the tolerance change

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message QS121 - Enter a validity time period for the tolerance change ?

  The SAP error message QS121, which states "Enter a validity time period for the tolerance change," typically occurs in the context of Quality Management (QM) when you are trying to set or change tolerances for inspection characteristics in a quality plan or inspection lot.
  
  Cause:
  The error arises when you attempt to create or modify a tolerance change without specifying a validity period. In SAP QM, tolerances for inspection characteristics must have a defined time frame during which they are applicable. If this validity period is not provided, the system cannot process the change, leading to the QS121 error.
  
  Solution:
  To resolve the QS121 error, you need to ensure that you enter a validity time period for the tolerance change. Here are the steps to do this:
  
  
  Access the Tolerance Change Screen: Navigate to the area in SAP where you are trying to change the tolerances (e.g., in the Quality Management module).
  
  
  Enter Validity Period: When