How To Fix W0064 - Combination of class type/class does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 064

• Message text: Combination of class type/class does not exist

Self-Explanatory Message

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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 W0064 - Combination of class type/class does not exist ?

  Certainly! Here's a detailed explanation for the SAP error message W0064: Combination of class type/class does not exist:
  
  Error Message
  W0064: Combination of class type/class does not exist
  
  Cause
  This warning message occurs when you try to assign or use a class in SAP that does not exist for the specified class type. In SAP, classes are categorized by class types (e.g., 001 for Material Classes, 300 for Customer Classes, etc.). If you specify a class type and a class that is not defined or does not exist under that class type, the system issues this warning.
  Common scenarios include:
  
  Entering a class that has not been created or activated in the system.
  Using an incorrect or mismatched class type and class combination.
  Typographical errors in the class or class type fields.
  Attempting to assign a class in a transaction or program where the class is not valid.
  
  
  Solution
  To resolve this warning, follow these steps:
  
  
  Verify Class Type and Class:
  
  Check the class type you are using and ensure it is correct for the business object or process.
  Verify that the class exists in the system for the given class type.
  
  
  
  Check Class Existence:
  
  Use transaction CL03 (Display Class) or CL02 (Change Class) to check if the class exists.
  Enter the class type and class name to confirm.
  
  
  
  Create or Correct Class:
  
  If the class does not exist, create it using transaction CL01 (Create Class).
  Ensure the class type is correctly assigned during creation.
  
  
  
  Correct Data Entry:
  
  If the class exists but the error persists, check for data entry errors in the class or class type fields.
  Correct any typos or mismatches.
  
  
  
  Check Integration Points:
  
  If the error occurs during integration (e.g., material master, customer master, classification), ensure the classification data is consistent and correctly maintained.
  
  
  
  Transport and Activation:
  
  If the class was recently created or changed, ensure it has been properly transported and activated in the target system.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  CL01 – Create Class
  CL02 – Change Class
  CL03 – Display Class
  CL24N – Class Hierarchy
  CL30N – Object List for Classes
  
  
  
  SAP Notes:
  
  Check SAP Notes related to classification and class management if the problem persists.
  
  
  
  Classification Overview:
  
  SAP classes are used to classify objects (materials, customers, documents, etc.) and are grouped by class types.
  Each class type corresponds to a specific business object or application area.
  
  
  
  Example:
  
  Class type 001 is typically used for material classes.
  If you try to assign a class ABC123 under class type 001 but ABC123 does not exist as a material class, you get this warning.
  
  
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Class does not exist for the specified class type (wrong or missing class/class type combo).
  
  
  Solution
  Verify and correct class and class type; create class if missing; check data entry accuracy.
  
  
  Related
  Use CL01/CL02/CL03 to manage classes; ensure proper transport and activation.
  
  
  
  
  If you provide the exact transaction or context where this error occurs, I can help with more specific guidance.