Count zero

Hi All,

In crystal report enterprise 4.1, I am trying to pop up an alert message when count is zero, actually the idea is when query executes if it returns zero records then alert message should pop up.  For this I selected Data from main menu and then I selected Alerts in condition formula I wrote the condition like this count ({table.field}) =0.  This is not working, any idea or suggestion please.

Thanks and regards,

A