How To Fix SCRL559 - Type of parameter &1 in method &2 was changed in an incompatible way.

SAP Error Message - Details

• Message type: E = Error

• Message class: SCRL - Messages for custom resuse libraries

• Message number: 559

• Message text: Type of parameter &1 in method &2 was changed in an incompatible way.

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 SCRL559 - Type of parameter &1 in method &2 was changed in an incompatible way. ?

  The SAP error message SCRL559 indicates that there is an incompatibility in the parameter type of a method in ABAP (Advanced Business Application Programming). This typically occurs when a method's parameter type has been changed in a way that is not compatible with previous versions of the method. This can happen during the development of classes or interfaces, especially when methods are being modified or when there are changes in the underlying data types.
  Cause:
  
  Incompatible Changes: The parameter type of a method has been changed from one data type to another that is not compatible. For example, changing a parameter from a simple data type (like CHAR or INT) to a complex data type (like a structure or a table) or vice versa.
  Inheritance Issues: If the method is part of a class hierarchy, changes in the base class can lead to incompatibilities in derived classes.
  Interface Changes: If the method is part of an interface, changes to the interface can affect all implementing classes.
  
  Solution:
  
  Review Changes: Check the change history of the method to understand what modifications were made to the parameter types. This can be done using the ABAP Workbench (SE80) or the Object Navigator.
  Update Implementations: If the method is implemented in other classes, ensure that all implementations are updated to match the new parameter types. This may involve changing the data types in the method signature of the implementing classes.
  Check Inheritance: If the method is inherited, ensure that the derived classes are also updated to reflect the changes made in the base class.
  Recompile: After making the necessary changes, recompile the affected classes and methods to ensure that the changes are recognized by the system.
  Testing: Conduct thorough testing to ensure that the changes do not introduce new issues and that the functionality remains intact.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for guidelines on method definitions and parameter types.
  Change Management: Implement a change management process to track changes in method signatures and ensure that all dependent objects are updated accordingly.
  Version Control: Use version control systems to manage changes in ABAP code, which can help in identifying and reverting incompatible changes if necessary.
  
  By following these steps, you should be able to resolve the SCRL559 error and ensure that your ABAP methods are compatible with their intended use.