I have come to know that many BW objects are not available in BW anymore while working on BW 7.4. There are substitute for each obsolete objects as mentioned below.
|Obsolete Object||Substitute in BW 7.4|
|Infospoke||Open Hub Destination|
|3.x DataSource||7.x DataSource|
|3.x data archiving||7.x data archiving|
|CompositeProvider in Workbench (RSA1)||CompositeProvider in HANA Stuido|
|Virtual Provider on 3.x Infosource||CompositeProvider|
It is recommended to use new objects as they provide more functions and better usability.By default, all these obsolete function are hidden. That means mostly 3.x functions in the context menu on the object trees in RSA1 and in other transaction are not available.
However, you can change this setting using tcode RSCUSTV32