nmap -sT -p 1521 -d -Pn -e eth4 --script oracle-brute --script-args "unpwdb.timelimit=3h,oracle-brute.sid=UPGR,userdb=C:\Users\rag\Downloads\usernames.lst,passdb=C:\Users\rag\Downloads\passwords.lst" 192.168.1.102

In oracle password brute force scanning there are a lot of errors like this:

NSE: oracle-brute against 192.168.1.102:1521 threw an error!
C:\Program Files (x86)\Nmap/nselib/tns.lua:1278: attempt to call a nil value (method 'len')
stack traceback:
C:\Program Files (x86)\Nmap/nselib/tns.lua:1278: in field 'unmarshalKvpComponent'
C:\Program Files (x86)\Nmap/nselib/tns.lua:1202: in field 'unmarshalKvp'
C:\Program Files (x86)\Nmap/nselib/tns.lua:498: in method 'parseResponse'
C:\Program Files (x86)\Nmap/nselib/tns.lua:1427: in method 'exchTNSPacket'
C:\Program Files (x86)\Nmap/nselib/tns.lua:1726: in method 'Login'
C:\Program Files (x86)\Nmap/scripts\oracle-brute.nse:140: in method 'login'
C:\Program Files (x86)\Nmap/nselib/brute.lua:768: in method 'doAuthenticate'
C:\Program Files (x86)\Nmap/nselib/brute.lua:821: in function <C:\Program Files (x86)\Nmap/nselib/brute.lua:797>

nmap_output_oracle.txt