count if sum(value) is less than 0 or null in qlik sense

[Tarig]

Hello

I am trying build a bar chart that count the number of people who delcared Zero income by year. below is the expression I used

If((sum(Income)) <= 0, Count (Distinct [PersonId]))

but I'm getting this error msg "The chart is not displayed because it contains only undefined value"

I tried this expression  as well but still no luck:

Count({<[PersonId]={"=Sum([Income]) <= 0 "}>} distinct [PersonId])

[rwunderlich]

Your set analysis expression looks correct. What error/result are you getting with that expression?

-Rob

[Tarig]

I'm getting this error "The chart is not displayed because it contains only undefined value" when I add the first expression. the second expression is not returing any value.