How To Fix 0T001 - Transport layer &1 does not start with "S"

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 001

• Message text: Transport layer &1 does not start with "S"

What causes this issue?

You entered a transport layer that does not start with 'S'.
The name of a layer for an SAP system must start with 'S'.
Sometimes SAP and customer systems are mixed, and transport layers that
start with 'Y' and 'Z' exist.

System Response

A warning is triggered.

How to fix this error?

Enter a transport layer that starts with 'S', or delete the transport
route and the transport layer. Create a new transport route with the
new transport layer.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 0T001 - Transport layer &1 does not start with "S" ?

  The SAP error message "0T001 Transport layer &1 does not start with 'S'" typically indicates an issue with the transport layer configuration in the SAP system. This error occurs when the transport layer identifier does not conform to the expected naming convention, which requires that the transport layer name starts with the letter "S" for standard transport layers.
  Cause:
  
  Incorrect Transport Layer Name: The transport layer name specified in the transport request does not start with "S". This is a requirement for standard transport layers in SAP.
  Configuration Issues: There may be a misconfiguration in the transport management system (TMS) settings.
  Custom Transport Layer: If a custom transport layer has been created, it may not adhere to the naming conventions expected by the system.
  
  Solution:
  
  
  Check Transport Layer Configuration:
  
  Go to transaction code SE03 (Transport Organizer Tools).
  Select "Transport Layer" and check the configuration of the transport layers defined in your system.
  Ensure that the transport layer you are trying to use starts with "S".
  
  
  
  Modify Transport Request:
  
  If you are working with a transport request that has an incorrect transport layer, you may need to modify the transport request to use a valid transport layer that starts with "S".
  
  
  
  Create a New Transport Layer:
  
  If necessary, create a new transport layer that adheres to the naming convention. This can be done in transaction SE03 under the "Transport Layer" section.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP Basis team for specific guidelines on transport layer naming conventions and configurations.
  
  
  
  Check Transport Routes:
  
  Ensure that the transport routes are correctly defined in TMS and that they are pointing to the correct transport layers.
  
  
  
  Related Information:
  
  Transport Management System (TMS): TMS is responsible for managing the transport of objects between different SAP systems (e.g., Development, Quality Assurance, Production).
  Transport Layer Naming Convention: Standard transport layers typically start with "S" (e.g., "S01", "S02"). Custom transport layers may have different naming conventions but should still follow the guidelines set by your organization.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on transport layer configurations.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP Basis team or consult SAP support for further assistance.