How To Fix WPLG009 - Call module is not maintained; see long text

WPLG009 - Overview

• Message type: E = Error

• Message class: WPLG - Interfaces for Space Management

• Message number: 009

• Message text: Call module is not maintained; see long text

What causes this issue?

A function module, in which the interface parameter is transferred and
the external program is started, is necessary to call the external
optimization program.
The interface of the function module must be a copy of
'SHELF_SPACE_MAP_OPT_ASCII_GEN'.

How to fix this error?

Maintain the name of the call module under <DS:TRAN.WSS1>Space
Management Interface</>
in the IMG activity <DS:SIMG.W_GE_0100>General Control, Retail Master
Data</>

Error message extract from SAP system. Copyright SAP SE.

WPLG009 - Details

• Certainly! Here's a detailed explanation for the SAP error message WPLG009: Call module is not maintained; see long text:
  
  Error Message
  WPLG009: Call module is not maintained; see long text
  
  Cause
  This error occurs in SAP Workflow when the system tries to execute a call module (a function module or a method) that has not been properly maintained or configured in the workflow customizing. Essentially, the workflow is trying to call a module that either:
  
  Has not been assigned in the workflow customizing,
  The module name is incorrect or missing,
  Or the call module configuration is incomplete or missing in the relevant workflow container or task.
  
  
  When does it occur?
  
  During workflow execution, especially when a step involves calling a function module or method.
  When the workflow step is configured to call a module, but the module is not maintained in the workflow customizing.
  When the workflow container or task does not have the required call module assigned.
  
  
  Solution
  
  
  Check Workflow Customizing:
  
  Go to