How To Fix SAP_VF020 - Function & cannot be called in conditional syntax

SAP Error Message - Details

• Message type: E = Error

• Message class: SAP_VF - SAP_VF

• Message number: 020

• Message text: Function & cannot be called in conditional syntax

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAP_VF020 - Function & cannot be called in conditional syntax ?

  The SAP error message "SAP_VF020 Function & cannot be called in conditional syntax" typically occurs in the context of SAP ABAP programming, particularly when dealing with function modules or methods that are being called within conditional statements (like IF statements) in a way that is not allowed.
  Cause:
  
  Function Module in Conditional Statement: The error arises when a function module or method is called directly within a conditional statement (e.g., IF, CASE). In ABAP, function calls should not be placed directly in the condition of an IF statement.
  Syntax Error: The syntax of the conditional statement is incorrect because it expects a boolean expression, not a function call that returns a value.
  
  Solution:
  To resolve this error, you should separate the function call from the conditional statement. Here’s how you can do it:
  
  Store the Function Result in a Variable: Call the function module or method before the conditional statement and store its result in a variable.
  Use the Variable in the Conditional Statement: Use the variable in the conditional statement instead of calling the function directly.
  
  Example:
  Here’s an example to illustrate the solution:
  Incorrect Code:
  IF my_function_module( ) = 'Some Value'.
      " Do something
  ENDIF.
  Correct Code:
  DATA: lv_result TYPE string.
  
  lv_result = my_function_module( ).
  
  IF lv_result = 'Some Value'.
      " Do something
  ENDIF.
  Related Information:
  
  Function Modules: These are reusable pieces of code in SAP that can be called from various programs. They can perform specific tasks and return values.
  ABAP Syntax: Understanding the syntax rules of ABAP is crucial for avoiding such errors. Always ensure that function calls are made outside of conditional expressions.
  Debugging: If you encounter this error, check the line number indicated in the error message and review the surrounding code for any function calls within conditional statements.
  
  By following these guidelines, you should be able to resolve the SAP_VF020 error effectively.