reports - Aggregate Formula - countif

reports - Aggregate Formula - countif

I am creating a report and want it to count based on there being nothing and im using the following script:
  1. countif("Autoview_1496775088044_Row_Subform Table"."Scion"='')
it always returns 0, am I using the right operator of ='' ?  When I do the inverse !='' it works perfectly and counts only the cells with data.