ORA-12541: TNS:no listener Cause: The connection request could not be completed because the listener is not running.Action: 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.
检查下 ora 的连接，你用plsql能连接吗？