Excluding result of one report in another report.

Hell Experts,

We have two DSOs as below:

DSO1 - Contains Master list of customers

DSO2 - Transactions of all customer.

I want a report to show all customers who do not have any transactions.

So thought of come up with all unique set of customers from DSO2 then read the DSO1 exclude this list (using replacement path), but raised that exclusion is not possible in replacement path.

Is there a way I can do this in BEx.

Any thoughts in this regard of great help.

Regards,