Cause: d by the fact that the TNSLSNR
executable cannot be found in the place expected in your platform`s ORACLE
environment. Verify that the full pathname of the TNSLSNR executable as
displayed by LSNRCTL is correct.
Action: If NS error code 12538 is also
returned then the BEQ driver is not installed; call Oracle Worldwide Support
as the BEQ driver should always be installed. If this is not the problem then
the error is probably

Relared Errors:
TNS-01101:
Could not find service name string
TNS-01102: TNS
application contacted was not the listener
TNS-01103:
Protocol specific component of the address is incorrectly
specified
TNS-01106:
Listener using listener name string has already been
started
TNS-01107: A
valid trace level was not specified
TNS-01108:
Listener password prompt failed
TNS-01109:
Listener password encryption failed
TNS-01110:
Mismatch - password unchanged
TNS-01111: Log
status can either be ON or OFF
TNS-01112: Plug
and play can either be ON or OFF