Checking Data Selection in UBE

I would like to know how data selection is checked within a UBE.  For example, a report comes back with No Data Selected.  I want to know how to incorporate that into the End Section so that I don't call an addtional report to kick off, when the section is started.  I understand that the Init Section starts and does the data selection.  Then the Advance Section, followed by the Do Section.  I see that the Do Section does not start if there is no data selected, but how do I stop the End Section from starting?  Is there a System Function