How To Fix OO290 - Parameter &1 &2 &3: Invalid method type (MTDTYPE)

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 290

• Message text: Parameter &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 OO290 - Parameter &1 &2 &3: Invalid method type (MTDTYPE) ?

  The SAP error message OO290, which states "Parameter &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 method type specified in the class or interface definition is not recognized or is incorrectly defined. This could be due to a typo or using a method type that is not valid in the context.
  Incorrect Parameter Passing: The parameters being passed to the method may not match the expected types or structure defined in the method signature.
  Class/Interface Definition Issues: There may be issues in the class or interface definition, such as missing or incorrectly defined methods.
  
  Solution:
  
  
  Check Method Definition: Review the method definition in the class or interface to ensure that the method type is correctly specified. Common method types include:
  
  PUBLIC
  PROTECTED
  PRIVATE
  STATIC
  INSTANCE
  
  Ensure that the method type aligns with the intended access level and usage.
  
  
  Verify Parameter Types: Ensure that the parameters being passed to the method match the expected types defined in the method signature. Check for any discrepancies in data types or structures.
  
  
  Review Class/Interface Implementation: If the method is being called from another class or interface, ensure that the calling code is correctly referencing the method and that the class/interface is properly implemented.
  
  
  Check for Typos: Look for any typographical errors in the method name or parameter names that could lead to this error.
  
  
  Debugging: If the issue persists, consider using debugging tools in SAP to trace the execution flow and identify where the error is occurring.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Object-Oriented ABAP programming for more details on method definitions and types.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and to seek advice from experienced developers.
  ABAP Development Tools: Utilize ABAP development tools like the ABAP Workbench (SE80) or ABAP Development Tools in Eclipse for better code navigation and error checking.
  
  By following these steps, you should be able to identify and resolve the cause of the OO290 error in your SAP environment.