How To Fix OO_SOURCE_BASED021 - It is not possible to set break-points in interfaces

SAP Error Message - Details

• Message type: E = Error

• Message class: OO_SOURCE_BASED - WB - Class Builder - Messages for the source-b. Class Editor

• Message number: 021

• Message text: It is not possible to set break-points in interfaces

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO_SOURCE_BASED021 - It is not possible to set break-points in interfaces ?

  The SAP error message OO_SOURCE_BASED021 indicates that you are trying to set breakpoints in an interface, which is not allowed in the ABAP programming environment. This is a common issue when debugging ABAP code that involves interfaces.
  Cause:
  The primary cause of this error is that breakpoints cannot be set directly in interface definitions. In ABAP, interfaces are abstract and do not contain executable code; they only define method signatures. Therefore, the debugger cannot stop at a point in an interface.
  Solution:
  To debug the implementation of an interface, you should set breakpoints in the concrete classes that implement the interface, rather than in the interface itself. Here’s how you can do that:
  
  Identify the Implementing Class: Find the class that implements the interface you are interested in.
  Set Breakpoints in the Class: Open the implementing class in the ABAP editor and set breakpoints in the methods that implement the interface.
  Debug the Calling Program: Run the program or transaction that calls the methods of the implementing class. The debugger will stop at the breakpoints you set in the class.
  
  Related Information:
  
  Debugging Interfaces: When debugging, always focus on the concrete implementations of interfaces rather than the interfaces themselves.
  ABAP Debugger: Familiarize yourself with the ABAP debugger tools, which allow you to inspect variables, watchpoints, and call stacks.
  Documentation: Refer to SAP documentation for more details on debugging techniques and best practices in ABAP.
  
  By following these steps, you should be able to effectively debug your ABAP code without encountering the OO_SOURCE_BASED021 error.