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

FL031 - Overview

• 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