"stty: : Inappropriate ioctl for device"?

I run a shell on Solaris and got "stty: : Inappropriate ioctl for device" message. The program runs very well except that message. I know this is because I use "host" inside the SQL PLUS session. But, why? If I run this in a standalone SQL PLUS session (I mean, not through a shell),
there is no such message.

Does any one have any idea?

=======================================
This is the shell I run:

CURR_DIR=/u01/tom;export CURR_DIR
SCRIPT_DIR=$CURR_DIR/script;export SCRIPT_DIR
LOG_FILE=$CURR_DIR/log/ck_perf.log;export LOG_FILE

EMAIL_ADDRESS=tom@tty.com; export EMAIL_ADDRESS

if test $# -ne 1
then
echo Usage: `basename $0` sid
exit 1
fi

cd $SCRIPT_DIR
{
sqlplus -s /nolog <<__EOF 1>$LOG_FILE 2>&1
connect dba_admin/$DBA_PWD@$1
select sysdate from dual;
host date
__EOF
}>$LOG_FILE
cat $LOG_FILE|mailx -s "logfile" tom@tty.com

=====================================
The result of the logfile. Please see the "ioctl" at the bottom.

Connected.

SYSDATE
---------
26-APR-01

stty: : Inappropriate ioctl for device
Thu Apr 26 11:19:35 PDT 2001