How To Fix FL168 - & is already declared as a parameter in &

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 168

• Message text: & is already declared as a parameter in &

What causes this issue?

The name of a table parameter in a function module with a global
interface is already defined as an import or export parameter in
another or the same function module with global interface.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Change the name of your table parameter so that it differs from the
import or export parameter by at least one character. Then, repeat your
action.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL168 - & is already declared as a parameter in & ?

  The SAP error message FL168 typically indicates that there is a naming conflict in your ABAP program or function module. Specifically, it means that a variable or field name has been declared more than once in the same scope, which is not allowed in ABAP.
  Cause:
  The error occurs when:
  
  A parameter name in a function module or method is the same as a variable name declared in the same scope.
  You have declared a parameter in the interface of a function module or method that has the same name as a local variable or field in the implementation.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Rename Variables or Parameters: Change the name of either the parameter or the local variable to ensure that they are unique within the same scope. This is the most straightforward solution.
  
  
  Check Function Module/Method Interface: Review the interface of the function module or method to ensure that the parameter names do not conflict with any local variable names.
  
  
  Use Prefixes: It is a good practice to use prefixes for parameters and local variables to avoid such conflicts. For example, you might use p_ for parameters and lv_ for local variables.
  
  
  Review Code for Scope: Ensure that you are aware of the scope of your variables and parameters. If a variable is declared in a broader scope, it may conflict with a parameter in a narrower scope.
  
  
  Related Information:
  
  ABAP Naming Conventions: Familiarize yourself with naming conventions in ABAP to avoid such conflicts in the future.
  Debugging: Use the ABAP debugger to step through your code and identify where the conflict arises.
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more details on variable declarations and scope.
  
  By following these steps, you should be able to resolve the FL168 error and prevent it from occurring in the future.