ReadyAPI does not show the response when data source loop ran

I have  a test case with datasource loop with data fetching from external source txt file.  File ran sucessfully and when i look at the transaction log, i can see all the loop has ran and each entry for the request, but when i click on open button it shows nothing. it shows as <not-xml/>

is there any configuration there to fix it?

can anyone help on this please?

-AnilV