Cause: TLI failed to connect the client
to the remote server. The network line to the remote host may be down.
Action: Use other network login programs
to make sure that the remote host is accessible.

Relared Errors:
ORA-06720: TLI
Driver: SID lookup failure
ORA-06721: TLI
Driver: spurious client req
ORA-06722: TLI
Driver: connection setup failure
ORA-06730: TLI
Driver: unable to open clone device
ORA-06731: TLI
Driver: cannot alloc t_call
ORA-06732: TLI
Driver: cannot alloc t_discon
ORA-06733: TLI
Driver: failed to receive disconnect
ORA-06734: TLI
Driver: cannot connect
ORA-06735: TLI
Driver: client failed to close error conn
ORA-06736: TLI
Driver: server not running