How To Fix LESI001 - Activate either a link to external system or to TRM

LESI001 - Overview

• Message type: E = Error

• Message class: LESI - Messages for LES-TRM Interface package

• Message number: 001

• Message text: Activate either a link to external system or to TRM

What causes this issue?

You tried to activate the interface to an external subsystem and the
interface to Task and Resource Management (TRM).

System Response

The system only allows a clear relationship between LES and TRM.

How to fix this error?

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

Procedure for System Administrators

If you want to use TRM together with an external system, the external
subsystem must only be allowed to confirm one step (removal or
transport) of the transfer order. If the external subsystem confirms
both steps, TRM cannot be activated in addition.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message LESI001 - Activate either a link to external system or to TRM ?

  The SAP error message LESI001 typically occurs in the context of the Logistics Execution System (LES) when there is an issue with the integration between SAP and an external system or when the Transportation Management (TRM) module is not properly configured or activated.
  
  Cause:
  
  Missing Configuration: The error often arises when the system is not configured to link to an external system (like a third-party logistics provider) or to the Transportation Management module.
  Inconsistent Settings: There may be inconsistencies in the settings related to the logistics execution processes, such as missing parameters or incorrect settings in the configuration.
  System Integration Issues: If the system is expected to communicate with an external system, there may be issues with the connection or the necessary middleware not being set up correctly.
  
  
  Solution:
  
  
  Check Configuration:
  
  Go to the SAP Customizing Implementation Guide (IMG) and navigate to the relevant sections for Logistics Execution and Transportation Management.
  Ensure that the necessary settings for linking