I have a working formula for looking up an external reference sheet. All the external fields are tagged with an M:
=COUNTIFS({ReportM}, "Jul 24 - Oct 24", {ProjectM}, Metric@row)
but I now need to exclude a third criterion {ThemeM}, "History"
I tried adding it as
=COUNTIFS({ReportM}, "Jul 24 - Oct 24", {ProjectM}, Metric@row, NOT( {ThemeM}, "History"))
but it returned an INCORRECT ARGUMENT or UNPARSEABLE error.
Grateful for some guidance on the correct syntax to achieve a count that excludes the "History" Theme from the count.