ORA-12545: Connect failed because target host

admin

ORA-12545: Connectfailed because target host or object does not exist
Cause: The address specified is not valid, or the programbeing connected to does
not exist.
Action: Ensurethe ADDRESS parameters have been entered correctly; the most
likely incorrect parameter is the node name. Ensure that the executable for the
server exists (perhaps "oracle" is missing.) If the protocol isTCP/IP, edit the
TNSNAMES.ORA file to change the host name to a numeric IP address and try
again.