Unable to retrieve the database names

I am not able to retrieve the database name, please help me as soon as possible,

---> Used Command
sqlmap.py -u http://xxx.com/x.jsp?uid=f --level=5 --risk=3 --threads=10 --dbms=postgresql --no-cast --dbs

---> SQLMap Output

[00:01:49] [INFO] testing connection to the target url

sqlmap identified the following injection points with a total of 0 HTTP(s) requests:

Place: GET
Parameter: uid
Type: boolean-based blind
Title: OR boolean-based blind - WHERE or HAVING clause

Payload: uid=-5644)) OR (4237=4237) AND ((3125=3125

[00:01:51] [INFO] the back-end DBMS is PostgreSQL
web application technology: Apache, Servlet 2.5, JSP 2.1
back-end DBMS: PostgreSQL
[00:01:51] [INFO] fetching database names
[00:01:51] [INFO] fetching number of databases
[00:01:52] [WARNING] reflective value(s) found and filtering out
[00:01:52] [INFO] retrieving the length of query output
sqlmap got a 302 redirect to 'http://xxx.com/error.jsp'. Do you want to follow? [Y/n] n
[00:01:55] [INFO] heuristics detected web page charset 'None'

[00:01:55] [INFO] retrieved:
[00:01:56] [WARNING] in case of continuous data retrieval problems you are advised to try a switch '--no-cast' and/or switch '--hex'
[00:01:56] [ERROR] unable to retrieve the number of databases
[00:01:56] [INFO] falling back to current database
[00:01:56] [INFO] fetching current database
[00:01:56] [INFO] retrieving the length of query output
[00:01:56] [INFO] retrieved:
[00:01:57] [INFO] retrieved:
[00:02:01] [CRITICAL] unable to retrieve the database names

[*] shutting down at 00:02:01

I am also used this command
--url= http://xxx.com/x.jsp?uid=f --level=5 --risk=3 --threads=10 --dbms=postgresql --dbs --parse-errors -t ./SQM/TRAFFIC/traffic.txt

[stamparm]

It's not very clear what is going on from your Issue text. Also, if you want to be served "as soon as possible" then this is not the right place. Are you able to use that same payload inside a browser (to distinguish True from False results)?

E.g. try "uid=-5644)) OR (4237=4237) AND ((3125=3125" inside a browser and also "uid=-5644)) OR (4237=4236) AND ((3125=3125". If there is a noticable difference in responses between those two please report back. Otherwise, you are dealing with a false positive.

[stamparm]

Because of no response, closing this one down

Thanks for your help. You are right Mr. Stamparm, it's a false positive because both response are same.