I need to include a date parameter and an additional calculation within my existing set anlaysis expression. I had originally try to include it in a varilable but that was causing problems. My current expression using the variable is below:
the variable is not the problem... Date use in Set Analysis is very tricky. In order to compare dates in set analysis, you have to format the value EXACTLY the same way your Date Field it formatted - I mean, even the difference between 'M/D/YYYY' and 'MM/DD/YYYY' can break it.
If your Date Field "ObserverDate" is formatted as 'MM/DD/YYYY' (look it up in Document Properties, Number) - then format your variable value the same way: