I have a subtotal field for a calculated column that I want to hide when my report has not ran yet because on days with no data it shows up as `NaN` on the report.

I have tried two methods but neither are working and I am sure it is almost correct. I just don't know what is wrong with the expression.

I tried hiding if my dataset had no rows.

```
=IIf((CountRows("ScannerStatisticsData")=0),False,True)

```

I also tried making a calculation 

```
=iif((fields!Scans.Value / fields!numberOfCases.Value) = 0, False, True)

```

I also tried checking isnothing on one of the columns in the calculation

```
=iif(IsNothing(fields!Scans.Value), False, True)

```

What am I doing wrong?