Hello Deepak,
the print version will display the table (ALV) as a PDF document. For this to function you need an ADS (Adobe Document services) instance somewhere installed (on a Java stack) and some simple configuration steps, as they are described in the Help-Link when you get the RFC error message.
In my experience the print version PDF is not really useful and people use the Excel-Export much more frequently.
btw the ADS is then also needed for the Print-fact-sheet function, which renders a PDF from item data.
regards,
Johannes