Hi Arjun,
This is normally because you have one or more content items that does not have any content in the main edit box area.
This may be due to content created using a third party extension that is using the main Joomla content tables for it's data.
If this is the case the only way around it is to go through either before compiling (which I would recommend) or via the edit feature in export content and enter something in like hitting the space bar or a no breaking space( ) or anything else you like.
This will make Joomla think that the content item is not empty.
