Data Transfer Workbench Before 4.6A 
Purpose
You can process objects which for technical reasons are not supported by the new Data Transfer Workbench, with the old Data Transfer Workbench used before Release 4.6A.
You use the Data Transfer Workbench to transfer data automatically from your legacy system to the R/3 System.
The Data Transfer Workbench before Release 4.6A also provides the necessary tools and access to the standard programs for transferring data.
The Workbench is particularly useful for large amounts of data. It guarantees that data is transferred efficiently and ensures that data in the R/3 System remains consistent throughout the application program.
Integration
The Data Transfer Workbench integrates the majority of application-specific data transfer programs into a uniform user interface.
Features
The Workbench provides you with all the data transfer functions. You can call all of the functions from the initial screen of the Workbench :
Restrictions
You should create a conversion program that transfers your data into the appropriate structure for the R/3 System. The Data Transfer Workbench helps you to create this conversion program by enabling, for example, data definitions to be exported into other programming languages, .