stdin: is not a tty

Hi,
I wrote a very short script aimed to backup my remote sites on a local 
machine. The script launches but fails : "stdin: is not a tty"

Could someone give me a hand and tell me what's going wrong in what I 
wrote ? (see below)

Big thanks in advance,
Emmanuel


if [ $TEST_JOUR = 3 ]
then
echo "demarrage CELEONET"
#syntaxe lftp protocole source local"
lftp ftp://login:password@server  -e "mirror  -x tmp -x local --log 
/Users/macmini/scripts/log_lftp.txt /www/spip/sites 
/Users/macmini/Sites/sauvegardes_ITCCA/ ; quit"
fi
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