Oracle Error Codes

TNS:no listener

The connection request could not be completed because the listener is not running.

How to Solve :

Ensure that the supplied destination address matches one of the addresses used by the listener – compare the TNSNAMES.ORA entry with the appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to go by way of an Interchange). Start the listener on the remote machine.