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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

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