How To Fix P0735 - Definition of in and output parameters only possible for functions

SAP Error Message - Details

• Message type: E = Error

• Message class: P0 - Messages for Transactions PE01, PE02 and PE03

• Message number: 735

• Message text: Definition of in and output parameters only possible for functions

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message P0735 - Definition of in and output parameters only possible for functions ?

  The SAP error message P0735, which states "Definition of in and output parameters only possible for functions," typically occurs when there is an issue with the definition of parameters in a function module or method in ABAP (Advanced Business Application Programming). This error indicates that the system is expecting a function module or method where input and output parameters can be defined, but it is encountering a situation where this is not possible.
  Causes:
  
  Incorrect Definition: The function module or method may not be defined correctly, leading to issues with parameter definitions.
  Using a Subroutine Instead of a Function Module: If you are trying to define parameters for a subroutine (FORM) instead of a function module (FUNCTION), this error will occur.
  Incompatible Context: The context in which you are trying to define the parameters may not support parameter definitions, such as within a class or interface where it is not allowed.
  Syntax Errors: There may be syntax errors in the code that prevent the proper recognition of the function module or method.
  
  Solutions:
  
  Check Function Module Definition: Ensure that the function module is defined correctly with the appropriate parameters. You can do this by navigating to the function module in transaction SE37 and reviewing its parameters.
  Use Function Modules: If you are trying to define parameters for a subroutine, consider converting it to a function module if it needs to have input and output parameters.
  Review Context: Make sure you are in the correct context (e.g., within a function module or method) when defining parameters. If you are in a class or interface, ensure you are using the correct syntax for methods.
  Syntax Check: Perform a syntax check on your ABAP code to identify any errors that may be causing the issue. You can do this in the ABAP editor (transaction SE38 or SE80).
  Consult Documentation: Refer to SAP documentation or help resources for guidance on defining parameters in function modules and methods.
  
  Related Information:
  
  Function Modules: These are reusable pieces of code in SAP that can be called from other programs or function modules. They can have input and output parameters.
  ABAP Programming: Understanding the basics of ABAP programming, including how to define and use function modules, is essential for resolving this error.
  SAP Community: Engaging with the SAP Community or forums can provide additional insights and solutions from other developers who may have encountered similar issues.
  
  If the problem persists after checking these areas, consider reaching out to your SAP support team or consulting with an experienced ABAP developer for further assistance.