Valid if statement to display text if an error occurs

[Caterina_Pampol]

Hello guys,

In google sheet, I have a column which shows a percentage. When there is an error in the formula I setup IFERROR so that it gives a blank result.
In the app, I want to show the text “N/A” whenever there is a blank in said column.

So far I tried these options, none of which worked:

1. Valid_if: ISNOTBLANK([_THIS])
   Invalid value error: “N/A”

2. Valid_if: ISNOTBLANK([_THIS])
   Invalid value error: [_THIS]=“N/A”

3. IFERROR result in google sheet: “N/A”
   Valid_if: [_THIS]<>“N/A”
   Invalid value error: “N/A”

Do you have any Idea of what I’m doing wrong?

Thanks!