Ok, I'm going crazy. I have used this formula 3 times already on my roll up sheet and it's working just fine, but suddenly I'm getting an INCORRECT ARGUMENT error.
I've been staring at formulas all day...am I missing something here??
=COUNTIFS({Program Schedule - Shell Mobility pt 4 Range 1}, "Stage 2", {Program Schedule - Part 4 Helper 2}, true)
@Paul Newcome tagging as always :)