How To Fix W0065 - Internal class number not found

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 065

• Message text: Internal class number not found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W0065 - Internal class number not found ?

  Certainly! Here's a detailed explanation regarding the SAP error message W0065: Internal class number not found:
  
  SAP Error Message: W0065 - Internal class number not found
  
  Cause:
  The error W0065 typically occurs when the system tries to access or reference an internal class number that does not exist or cannot be found in the classification system. This usually happens in scenarios involving:
  
  Classification data processing (e.g., classifying materials, equipment, or documents).
  When the internal class number (which is an internal identifier for a class in SAP Classification system) is missing, deleted, or incorrectly referenced.
  Data inconsistencies or missing entries in tables related to classes, such as KLAH (Class header) or KSSK (Characteristic values).
  Custom programs or transactions trying to access a class number that is invalid or no longer exists.
  
  
  Explanation:
  
  In SAP Classification, each class has an internal class number (a unique identifier).
  When a process or program tries to retrieve or manipulate a class using an internal class number that is not present in the system, SAP raises this warning/error.
  This can happen during:
  
  Material classification
  Equipment classification
  Document classification
  Batch classification
  Or any custom development involving classification objects.
  
  
  
  
  Solution:
  
  
  Check the Class Number:
  
  Verify that the internal class number being referenced actually exists in the system.
  Use transaction CL02 (Change Class) or CL03 (Display Class) to check if the class exists.
  Alternatively, check table KLAH for the internal class number.
  
  
  
  Data Consistency:
  
  Run consistency checks on classification data.
  Use transaction CL30N (Class Consistency Check) to identify and fix inconsistencies.
  
  
  
  Correct the Reference:
  
  If the error occurs in a custom program or report, debug and check the source of the internal class number.
  Ensure that the program logic correctly retrieves and passes valid internal class numbers.
  
  
  
  Recreate or Restore Missing Classes:
  
  If the class was accidentally deleted, recreate it or restore from backup if possible.
  
  
  
  Check Authorizations:
  
  Sometimes, missing authorizations can cause the system to behave as if the class does not exist.
  Verify user authorizations for classification transactions.
  
  
  
  SAP Notes and Support:
  
  Check SAP Notes for any known issues related to this error.
  If the problem persists, consider raising a support ticket with SAP, providing details of the scenario and error.
  
  
  
  
  Related Information:
  
  
  Tables:
  
  KLAH - Class header data (contains internal class numbers)
  KSSK - Characteristic values
  KSSK and KSSK related tables for classification data
  
  
  
  Transactions:
  
  CL01 - Create Class
  CL02 - Change Class
  CL03 - Display Class
  CL30N - Class Consistency Check
  CL20N - Change Class for Object
  
  
  
  Common Scenarios:
  
  Material master classification errors
  Equipment master classification errors
  Batch classification errors
  
  
  
  Debugging Tips:
  
  Use transaction SE91 to look up message class and message number details.
  Use SE38 or SE80 to debug the program/report where the error occurs.
  Check the call stack and data flow to identify where the invalid class number is introduced.
  
  
  
  
  If you provide more context (e.g., transaction, process, or program where the error occurs), I can help with more specific guidance.