Multiple subreport appear even when they don't have any data

In my case, i have five subreports, each from a different business object list. Due to the initial mass-up, one business object dataset is copied into the rdlc subreport of the other 4. As a result, when this particular subreport has data, the other 4 subreport showed up as well even though they don't have data. The problem is solved by removing that particular object's dataset from the other 4 subreports