How can I report on userid's that are on event file but not CSV Lookup?

[cxfuent29]

I am using a lookup csv file.

events have userid and CSV file has userid.

Some of the event file userid's are not on CSV file (timing issue)

The output produces event count by userid.

I need to report on userid's that are on event file but not CSV,

Thanks ahead

[elliotproebstel]

Try appending this to your current search (but replace my_lookup.csv with the name of your actual lookup file):

| search NOT 
 [| inputlookup my_lookup.csv 
 | fields userid ]