How To Fix DS026 - Associated function module (INCLUDE &) does not exist

DS026 - Overview

• Message type: E = Error

• Message class: DS - Messages for Editing Text Elements in ABAP Programs

• Message number: 026

• Message text: Associated function module (INCLUDE &) does not exist

What causes this issue?

You attempted to create a program name beginning with <LB>ZX</>, but
this name range is reserved for INCLUDEs of exit function groups
(function groups containing only function exits).
Example:
Suppose you want to create a program called ZXaaaUnn. Programs in this
name range must be assigned to a function exit (INCLUDE LXaaaUnn), but
this function exit does not exist.

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?

Choose a different program name.

Error message extract from SAP system. Copyright SAP SE.

DS026 - Details

• The SAP error message DS026, which states "Associated function module (INCLUDE &) does not exist," typically occurs when there is a missing or incorrectly referenced function module in the ABAP program or report. This error can arise in various scenarios, such as during the execution of a report, when calling a function module, or when trying to access a specific include file.
  Causes:
  
  Missing Function Module: The function module that is being called does not exist in the SAP system. This could be due to a transport issue or if the function module was deleted or not created.
  Incorrect Naming: There might be a typo or incorrect naming in the function module call.
  Transport Issues: If the function module was recently transported from another system, it may not have been transported correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the function module.
  Development Environment Issues: If you are working in a