Force A SSIS Pkg To FAIL

Does anyone know how to force a SSIS step to fail? I don’t want to export a file if no records were written.

I found this but not quite sure how to implement it:
To do this, double-click on the connector line joining 2 of your
ExecuteSQL tasks and change the "Evaluation operation:" to any of the
options that include "Expression". This enables you to enter a
boolean expression that must evaluate to true for the path to be
followed. Assuming you've got an int parameter called "sp1rtnvalue"
which must evaluate to 1 for the flow to continue; your expression
would be: @sp1rtnvalue == 1

Am I suppose to define a @sp1rtnvalue in the stored procedure that creates the file I want to monitor? Do a record count in the stored procedure. In my pkg I enter the expression @sp1rtnvalue == 1 when I run that step the expression will evaluate to false and fail?

If so where exactly do I enter the Boolean expression (@sp1rtnvalue == 1) , what tab in what dialog/wizard??

I hope that made sense.

Thank you