How To Fix FL001 - Specify reference structures for table parameters

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 001

• Message text: Specify reference structures for table parameters

What causes this issue?

You entered a reference field for a table parameter instead of a
structure.

System Response

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

How to fix this error?

Enter the name of a structure (without a hyphen).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL001 - Specify reference structures for table parameters ?

  The SAP error message FL001, which states "Specify reference structures for table parameters," typically occurs in the context of function modules or methods where table parameters are defined. This error indicates that the system requires a reference structure to be specified for the table parameter, which is necessary for the system to understand the structure of the data being passed.
  Cause:
  
  Missing Reference Structure: The table parameter in the function module or method does not have an associated reference structure defined. This is required for the system to know the fields and data types that the table should contain.
  Incorrect Definition: The table parameter may be incorrectly defined in the function module or method signature, leading to the system not recognizing it properly.
  Inconsistent Data Types: If the data types of the fields in the table parameter do not match the expected types defined in the reference structure, this error can occur.
  
  Solution:
  
  
  Define Reference Structure:
  
  Go to the function module or method definition where the error occurs.
  Locate the table parameter that is causing the issue.
  Specify a reference structure for the table parameter. This can be done by selecting an existing structure that matches the expected data format or by creating a new structure if necessary.
  
  
  
  Check Parameter Definitions:
  
  Ensure that all parameters, especially table parameters, are correctly defined with appropriate reference structures.
  Verify that the data types of the fields in the table parameter align with those in the reference structure.
  
  
  
  Use SE11 to Create/Modify Structures:
  
  If you need to create or modify a structure, you can use transaction code SE11 (Data Dictionary) to define a new structure or modify an existing one.
  Make sure to activate the structure after making changes.
  
  
  
  Testing:
  
  After making the necessary changes, test the function module or method to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Function Module/Method Documentation: Review the documentation for the function module or method to understand the expected input and output parameters.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  ABAP Development Guidelines: Familiarize yourself with best practices for defining function modules and methods in ABAP, including the use of reference structures for table parameters.
  
  By following these steps, you should be able to resolve the FL001 error and ensure that your function module or method works as intended.