Help with ISBLANK function

medwards , seem fine, need data to test

Try like this

# Tables with no person assigned = CALCULATE(DISTINCTCOUNT(responsibility[table_id]),Filter(responsibility, responsibility[role_id]="Engineer" && ISBLANK(responsibility[user_id])))

If this does not help
Can you share sample data and sample output in table format? Or a sample pbix after removing sensitive data.

Hi, medwards 

You can try the following methods.

Sample data:

Measure:

# Tables with no person assigned = 
CALCULATE ( DISTINCTCOUNT ( responsibility[table_id] ),
        FILTER ( ALL ( responsibility ),
            responsibility[role_id] = "Engineer"
                && ISBLANK ( responsibility[user_id] )
        )
    )

Or

Measure = 
CALCULATE ( DISTINCTCOUNT ( responsibility[table_id] ),
        FILTER ( ALL ( responsibility ),
            responsibility[role_id] = "Engineer"
                &&  responsibility[user_id] = BLANK()
        )
    )

Is this the result you expect?

Best Regards,

Community Support Team _Charlotte

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Thanks for the various solutions. For some reason, the formulas are not capturing the blank values. I'm trying different fields besides user_id like user_lastname but still not recognizing blanks. Very strange