Thanks Jens.
3.x data sources are not supported anymore in BW 750 so we need to go with 7.x.
I always knew about the BAPIs in SAP systems only, however not sure about how to implement them on the non-SAP systems.
We don't have any ABAP consultant as of now and I am a Basis person, so it would be helpful if you could share any documents or steps to implement BAPI on 3rd party systems like Informatica.In the meantime I will check with the Informatica support team too.
Regards,
Ashok Oleti.