How To Fix C-039 - List object & has already been created

SAP Error Message - Details

• Message type: E = Error

• Message class: C- -

• Message number: 039

• Message text: List object & has already been created

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message C-039 - List object & has already been created ?

  The SAP error message C-039, which states "List object & has already been created," typically occurs when you attempt to create a list object in an SAP program or report that has already been defined or instantiated. This can happen in various contexts, such as when using ALV (ABAP List Viewer) or other reporting tools within SAP.
  Cause:
  
  Duplicate Definition: The list object you are trying to create has already been defined in the program. This can happen if the code that creates the list object is executed multiple times without proper checks.
  Scope Issues: The list object may be defined in a broader scope (e.g., globally) and you are trying to redefine it in a local scope.
  Program Logic: The program logic may inadvertently lead to the creation of the same list object multiple times.
  
  Solution:
  
  Check for Existing Definition: Before creating the list object, check if it already exists. You can use a conditional statement to verify if the object is already defined.
  IF NOT <list_object> IS BOUND.
      CREATE OBJECT <list_object>.
  ENDIF.
  
  Use Unique Names: Ensure that the names of your list objects are unique within the scope of your program to avoid conflicts.
  Refactor Code: If the list object is being created in a loop or multiple times due to program logic, refactor the code to ensure that the object is created only once.
  Debugging: Use debugging tools to trace the execution of your program and identify where the list object is being created multiple times.
  
  Related Information:
  
  ALV Reports: If you are working with ALV reports, ensure that you are following best practices for creating and managing ALV objects. This includes proper initialization and destruction of objects.
  SAP Documentation: Refer to SAP's official documentation for guidelines on creating and managing list objects and ALV reports.
  Community Forums: Check SAP community forums or Stack Overflow for similar issues and solutions shared by other developers.
  
  By following these steps, you should be able to resolve the C-039 error and prevent it from occurring in the future.