How To Fix QE159 - The number of classes is 0

SAP Error Message - Details

• Message type: E = Error

• Message class: QE - RM-QSS Fehlertexte zur Ergebniserfassung

• Message number: 159

• Message text: The number of classes is 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 QE159 - The number of classes is 0 ?

  The SAP error message QE159, which states "The number of classes is 0," typically occurs in the context of Quality Management (QM) when you are trying to create or process a quality notification or inspection lot, and the system expects at least one class to be assigned but finds none.
  Cause:
  
  Missing Class Assignment: The most common cause of this error is that the relevant class (e.g., a classification system for quality notifications or inspection lots) has not been assigned or is not available in the system.
  Configuration Issues: There may be issues with the configuration of the classification system in SAP, such as missing or incorrectly set up class types.
  Master Data Issues: The master data for the material or the quality notification may not have the necessary classification data.
  
  Solution:
  
  
  Check Class Assignment:
  
  Navigate to the relevant transaction (e.g., creating a quality notification or inspection lot).
  Ensure that the appropriate class is assigned to the object you are working with. You can do this by checking the classification view of the material or the notification.
  
  
  
  Review Configuration:
  
  Go to the configuration settings for the classification system in SAP (transaction code SPRO).
  Ensure that the class types and classes are correctly defined and active.
  Check if the class type you are trying to use is correctly linked to the relevant object type (e.g., quality notifications).
  
  
  
  Update Master Data:
  
  If the material or object does not have the necessary classification data, you may need to update the master data to include the required classes.
  Use transaction codes like MM02 (for material master) to add the necessary classification.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific details on how to set up and manage classes and classifications in the context of Quality Management.
  
  
  
  Contact Support:
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SPRO: Customizing settings
  MM02: Change Material Master
  QM01: Create Quality Notification
  QA01: Create Inspection Lot
  
  
  SAP Notes: Check for any SAP Notes related to this error message for potential patches or updates that may resolve the issue.
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to access and modify classification data.
  
  By following these steps, you should be able to identify and resolve the cause of the QE159 error in SAP.