How To Fix FL031 - Type pool & has not been declared

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 031

• Message text: Type pool & has not been declared

What causes this issue?

You used a type from type pool & in the interface of a function module.

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?

For the program to be syntactically correct, you must declare the type
pool in the global data declaration of the function group using the
'TYPE-POOLS: &.' statement.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL031 - Type pool & has not been declared ?

  The SAP error message FL031 indicates that a type pool has not been declared in your ABAP program. Type pools in SAP are used to define data types that can be reused across different programs or function modules. When you encounter this error, it typically means that the program is trying to use a type pool that has not been included or declared properly.
  Cause:
  
  Missing Type Pool Declaration: The type pool you are trying to use has not been declared in your program.
  Incorrect Type Pool Name: The name of the type pool may be misspelled or incorrect.
  Type Pool Not Activated: The type pool exists but has not been activated in the system.
  Scope Issues: The type pool may not be accessible in the current context of your program.
  
  Solution:
  
  
  Declare the Type Pool: Ensure that you declare the type pool at the beginning of your ABAP program using the following syntax:
  TYPE-POOLS: <type_pool_name>.
  Replace <type_pool_name> with the actual name of the type pool you want to use.
  
  
  Check for Typos: Verify that the name of the type pool is spelled correctly in your declaration.
  
  
  Activate the Type Pool: If the type pool exists but is not activated, you need to activate it. You can do this by navigating to the type pool in the ABAP Dictionary (transaction SE11) and activating it.
  
  
  Check Authorization: Ensure that you have the necessary authorizations to access the type pool.
  
  
  Review Program Context: Make sure that the type pool is relevant and accessible in the context of your program. If you are using a type pool from a different package, ensure that the package is included in your program's context.
  
  
  Related Information:
  
  Transaction SE11: Use this transaction to view and manage data dictionary objects, including type pools.
  ABAP Documentation: Refer to the official SAP documentation for more details on type pools and their usage.
  Debugging: If the error persists, consider using the ABAP debugger to trace where the type pool is being called and to check the program's context.
  
  By following these steps, you should be able to resolve the FL031 error and successfully declare and use the required type pool in your ABAP program.