How To Fix FDT_EXPRESSIONS813 - No valid method: method &1 doesn't exist in class &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 813

• Message text: No valid method: method &1 doesn't exist in class &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS813 - No valid method: method &1 doesn't exist in class &2 ?

  The SAP error message FDT_EXPRESSIONS813 indicates that there is an issue with a method that is being called in a class within the SAP system. Specifically, the error message states that the method specified (denoted as &1) does not exist in the class specified (denoted as &2). This can occur in various contexts, such as when working with ABAP code, Business Rules Framework (BRF+), or other areas where methods are invoked.
  Cause
  The primary causes of this error message can include:
  
  Typographical Error: There may be a typo in the method name or class name when it is being called.
  Method Not Implemented: The method may not have been implemented in the specified class.
  Class Not Active: The class may not be active or may have been deleted or deactivated.
  Incorrect Class Reference: The class being referenced may not be the intended one, possibly due to naming conflicts or incorrect configuration.
  Versioning Issues: If the class or method was recently changed or updated, there may be versioning issues that prevent the method from being recognized.
  
  Solution
  To resolve the error, you can take the following steps:
  
  Check Method Name: Verify that the method name is spelled correctly and matches the case sensitivity of the method defined in the class.
  Check Class Name: Ensure that the class name is correct and that it is the intended class where the method is supposed to exist.
  Review Class Implementation: Open the class in the ABAP Workbench (transaction SE80 or SE24) and check if the method is implemented. If it is not, you may need to implement it.
  Activate Class: If the class is not active, activate it in the ABAP Workbench.
  Check for Changes: If there have been recent changes to the class or method, ensure that all relevant transports have been moved to the target system and that the system is up to date.
  Debugging: If you are unable to find the issue, consider using debugging tools to trace the execution and see where the method call is failing.
  
  Related Information
  
  Transaction Codes: Use transaction codes like SE80 (Object Navigator) or SE24 (Class Builder) to investigate the class and method definitions.
  Documentation: Check the SAP documentation for the specific class and method to understand its intended use and any dependencies.
  SAP Notes: Search for relevant SAP Notes that may address known issues or provide additional guidance related to this error message.
  Community Forums: Consider checking SAP Community forums or other developer forums for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the cause of the FDT_EXPRESSIONS813 error message in your SAP environment.