How To Fix OO322 - Exception &1 &2 &3: Invalid method type (MTDTYPE)

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 322

• Message text: Exception &1 &2 &3: Invalid method type (MTDTYPE)

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 OO322 - Exception &1 &2 &3: Invalid method type (MTDTYPE) ?

  The SAP error message OO322, which states "Exception &1 &2 &3: Invalid method type (MTDTYPE)," typically occurs in the context of Object-Oriented Programming (OOP) in ABAP. This error indicates that there is an issue with the method type being used in a class or interface.
  Cause:
  
  Invalid Method Type: The error usually arises when a method is called with an incorrect type or when the method is not defined properly in the class or interface.
  Inheritance Issues: If a method is being overridden in a subclass but does not match the signature of the method in the superclass, this can lead to this error.
  Dynamic Method Calls: If you are using dynamic method calls (e.g., using CALL METHOD), and the method type does not match the expected type, this error can occur.
  Typographical Errors: Simple typos in method names or parameters can also lead to this error.
  
  Solution:
  
  Check Method Definition: Verify that the method is defined correctly in the class or interface. Ensure that the method signature matches what is being called.
  Review Inheritance: If the method is part of an inheritance hierarchy, ensure that the method in the subclass correctly overrides the method in the superclass.
  Dynamic Calls: If using dynamic method calls, ensure that the method name and parameters are correct and that the method exists in the class being referenced.
  Debugging: Use debugging tools to trace the execution and identify where the invalid method type is being triggered. This can help pinpoint the exact location of the issue.
  Check for Typos: Review the code for any typographical errors in method names or parameters.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, including method definitions and inheritance.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  
  By following these steps, you should be able to identify and resolve the OO322 error in your SAP environment.