I understand what's going on. Thank you for the really good explanation Craige.
I believe if the condition doesn't find any rows associated with the condition, it breaks and stops.
"This Where-clause for data table 'Final table' resulted in no rows: Wafer == "12" & Formula == Empty()"
Instead, can it proceed so that it can keep plotting with the loop?
The example I give below contains code that will skip combinations for which there are no rows