How To Fix W+663 - The material class does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: W+ -

• Message number: 663

• Message text: The material class does not exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W+663 - The material class does not exist ?

  Certainly! Here's a detailed explanation for the SAP error message W+663: The material class does not exist:
  
  Error Message
  W+663: The material class does not exist
  
  Cause
  This warning message occurs when you try to assign or use a material class that is not defined or does not exist in the system. Material classes in SAP are used to classify materials based on certain characteristics, and they must be created and maintained in the system before they can be assigned to materials.
  Common causes include:
  
  The material class you are trying to assign has not been created in transaction CL02 or CL01.
  Typographical error in the material class name or number.
  The material class was deleted or is inactive.
  The class type used is incorrect or not suitable for materials (e.g., using a class type meant for equipment or documents).
  
  
  Solution
  To resolve this warning, follow these steps:
  
  
  Check if the material class exists:
  
  Use transaction CL03 (Display Class) to verify if the material class exists.
  Enter the class type (usually 001 for material classes) and the class name/number.
  
  
  
  Create the material class if it does not exist:
  
  Use transaction CL01 to create a new material class.
  Ensure you select the correct class type (usually 001 for materials).
  Define the necessary characteristics for the class.
  
  
  
  Correct the material class assignment:
  
  If the class exists, verify that you have entered the correct class name/number when assigning it to the material.
  Use transaction MM02 (Change Material) to assign the correct material class to the material.
  
  
  
  Check authorizations:
  
  Ensure you have the necessary authorizations to view or assign material classes.
  
  
  
  Check for inactive or deleted classes:
  
  If the class was deleted or made inactive, you may need to restore or create a new class.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  CL01 – Create Class
  CL02 – Change Class
  CL03 – Display Class
  MM01/MM02 – Create/Change Material (for assigning classes)
  
  
  
  Class Type for Materials: Usually 001.
  
  
  SAP Help / Documentation: Refer to SAP Help Portal or SAP Library under Classification System and Material Master.
  
  
  Notes:
  
  Material classes are part of the SAP Classification System, which allows grouping of materials based on characteristics.
  Proper maintenance of classes and characteristics is essential for classification and reporting.
  
  
  
  
  If you provide the exact scenario or transaction where this error occurs, I can give more tailored advice.