How To Fix TK243 - No transports allowed from application systems to Basis systems

TK243 - Overview

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 243

• Message text: No transports allowed from application systems to Basis systems

What causes this issue?

The current system &V1& is an application development system. The
target system &V2& for the request is a Basis system.

System Response

Transports cannot be performed from application systems to Basis
systems.
The action is terminated.

How to fix this error?

Choose an application development system as the target system for your
request.

Error message extract from SAP system. Copyright SAP SE.

TK243 - Details

• The SAP error message TK243, which states "No transports allowed from application systems to Basis systems," typically occurs in the context of transport management within SAP systems. This error indicates that the system is configured to prevent transport requests from being moved from application servers to Basis systems (such as the SAP kernel or database systems). 
  
  Cause:
  
  
  Transport Route Configuration: The transport route may be incorrectly configured. In SAP, transport routes define how transport requests can move between different systems (e.g., Development, Quality Assurance, Production). If the route does not allow transports from application systems to Basis systems, this error will occur.
  
  
  Transport Layer Settings: The transport layer settings may restrict certain types of transports. Each transport layer can have specific rules about which systems can send or receive transports.
  
  
  System Type Restrictions: The system type (e.g., Development, Quality, Production) may have restrictions on transport directions. For example, a Production system typically does