How To Fix 0T128 - System &1 has transport routes, but no standard layer for it

SAP Error Message - Details

• Message type: E = Error

• Message class: 0T - WBO Configuration Editor / SE06

• Message number: 128

• Message text: System &1 has transport routes, but no standard layer for it

What causes this issue?

The system &V1& is the starting point for the consolidation routes. No
transportable transport layer or default transport layer has been
assigned to this system or to a client of this system. New packages and
Customizing settings are recorded in local requests.

System Response

This is a warning.

How to fix this error?

Check and if necessary, correct the default transport layer(s) for the
system &V1&.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 0T128 - System &1 has transport routes, but no standard layer for it ?

  The SAP error message 0T128 indicates that the system has transport routes defined, but there is no standard layer associated with it. This typically occurs in the context of transport management within SAP systems, particularly when dealing with transport routes and layers.
  Cause:
  
  Missing Standard Layer: The error arises when the transport routes are configured, but the system does not have a standard layer defined for the transport routes. A standard layer is necessary for the transport system to know how to handle the transport requests.
  Configuration Issues: There may be issues in the configuration of the transport management system (TMS) or the transport routes themselves.
  System Landscape Changes: Changes in the system landscape, such as adding or removing systems, can lead to inconsistencies in the transport routes and layers.
  
  Solution:
  
  
  Define a Standard Layer:
  
  Go to the Transport Management System (TMS) configuration.
  Navigate to the transport routes and check if a standard layer is defined.
  If not, create a standard layer and assign it to the transport routes.
  
  
  
  Check Transport Route Configuration:
  
  Ensure that the transport routes are correctly configured.
  Verify that the source and target systems are correctly defined and that the transport layer is assigned.
  
  
  
  Transport Layer Assignment:
  
  Assign the appropriate transport layer to the transport routes.
  You can do this in the TMS configuration under the "Transport Routes" section.
  
  
  
  Consistency Check:
  
  Perform a consistency check in the TMS to identify any other potential issues that may be causing the error.
  Use transaction code STMS to access the TMS and perform checks.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error or provide additional guidance on transport layer configuration.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  STMS: Transport Management System
  SE06: Transport Organizer Tools
  
  
  Documentation: Refer to SAP Help documentation for Transport Management System for detailed guidance on configuring transport routes and layers.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error message 0T128 and ensure that your transport routes are properly configured with a standard layer.