What is Change and Transport System(CTS) in SAP ?

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Change and Transport System (CTS) is the tool provided by SAP for the creation, documentation and distribution of changes within a system landscape.
CTS comprises of  Change and Transport Organiser (CTO) : This provides several functions to facilitate software development 

 Transport Management System (TMS) : This is used to setup transport routes in the landscape. This provides functions to perform organize, monitor and perform transports within the landscape 

Transport Tools (R3trans and TP) : These are the tools that are used by SAP at operating system level to communicate with SAP, database and the files generated during the export process.


The transport control program (TP) is a utility for provided by SAP for managing transports and to handle release upgrades. This utility is inturn called by other programs like CTS, TMS and Upgrade control program (R3up)

R3trans is a transport program provided by SAP to handle transports between different SAP systems and for the release upgrades. R3trans is usually not called directly and it is called mostly by Transport control program(TP) and Upgrade control program(R3up)

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