How can i remove blanks on card visual using discont count

[Anonymous]

I am using this dax formular here but when there is a blank / null the card visual  shows "Blank" i have tried every trick and i cant get rid of the blank. anyone know how to get rid of it?

Count =

COALESCE(CALCULATE(DISTINCTCOUNT('WORKORDER'[SYSTEM])),0)

[alena2k]

hi @Anonymous 
I usually add variable is check if it is blank:
Count = 

VAR tmp = COALESCE(CALCULATE(DISTINCTCOUNT('WORKORDER'[SYSTEM])),0)

RETURN IF(ISBLANK(tmp), 0, tmp)

[Anonymous]

still getting a blank.