Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My oracle express edition was working some months earlier.

I dont know what i changed in the system, now I could not connect to it. I tried logging in from sqlplus as sysdba and altered the accounts to unlock, grant connect and resource privileges but I couldn't connect to database through sqltool.

I checked the listener.ora file where the host was Rajan. Ping on Rajan is working(pointing to localhost).

Error for lsnrctl

share|improve this question
What operating system are you running? (Windows XP/7/8? 32 or 64-bit?) – Phil Feb 8 '14 at 8:30

TNS-12541: TNS:no listener

Error message is self-explanatory, the listener is not running, so start the listener with "lsnrctl start". Since you are on Windows, it runs as a service, so you can start the service itself.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.