Hi Piyush,
InfoObjects and other targets are the same in 3.x and in 7.x. What varies between versions is
1) The way Datasources metadata is replicated to BW
Datasources are the same on the source system (that is: on ECC there isn't a 3.x vs. 7.x. distinction). It's at BW where the datasource metadata is replicated either as 3.x (ISFS object type) or as 7.x (RSDS object type)
2) The type of flow for loading data (3.x or 7.x)
Try the following
1. Delete your current BW's DataSource 3.x (ISFS) replica. Flow to 0VENDOR will be automatically deleted.
2. Replicate 0VENDOR_ATTR's application component metadata again. "Metadata replication" pops up. Accept and in "DataSource modifications" window deselect all datasources but 0VENDOR_ATTR so that only this DS is created (replicated). Verify objects' type is RSDS.
3. If DS succesfully replicates to BW as RSDS, all that is left to do is connect the DS to 0MATERIAL with a "common" 7.x transformation, create DTP, etc. You will no longer need 3.x flows.
I hope this helps solving your problem
Fernando