index=<index>
AND CASE("ERROR")
index=<index>
| transaction startswith="CASE("ERROR")" maxevents=250 mvlist=true
| table message
index=<index>
AND (error OR exception)
| table message
| eval message=replace(message,"\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d*\s","")
| stats count by message
| sort -count