oracle spool定时导出数据脚本 周末无法导出 求解啊

Question

定时任务定时每天凌晨3点导出数据，刚开始几天都正常导出，一到周天就导出个空文件了，sql测试过当天是有数据的，环境变量打印出来也是正常的，求解啊：
定时任务：
#!/bin/bash
. /home/unpay/etc/.profile

echo "test"$DBI_CONNSTR
export NLS_LANG="SIMPLIFIED CHINESE_CHINA.ZHS16GBK"
/s01/oracle/app/oracle/product/11.2.0/dbhome_1/bin/sqlplus $DBI_CONNSTR << EOF
@/home/unpay/sbin/lssql.txt;
EOF
cd /home/unpay/tmp/TransFile/czzh
if [! -f result.txt ];
then
echo "no file exits"
exit 1
fi
cp -rf result.txt test.txt
sed /^$/d result.txt > dxe.txt
ftp -n<<!
open **.*.***.**
user elink *******
binary
prompt off
cd czzhgl/$(date +%Y%m%d)
mput dxe.txt
close
bye
!
mv /home/unpay/tmp/TransFile/czzh/dxe.txt /home/unpay/tmp/TransFile/czzh/$(date +%Y%m%d).txt
rm -rf /home/unpay/tmp/TransFile/czzh/result.txt

lssql.txt:
set trimspool on;
set linesize 1000;
set pagesize 2000;
set newpage 1;
set heading off;
set term off;
set echo off;
set feed off;
spool /home/unpay/tmp/TransFile/czzh/result.txt;
select decode(txn_dir,1,rcv_brno,2,snd_brno,null)||'|'||decode(txn_dir,1,rcv_st_brno,2,snd_st_brno,null)||'|'||decode(txn_dir,1,rcv_
brname,2,snd_brname,null) from srpay_cnaps_txn where case when txn_dir='1' and act_status='01' and biz_type_code!='A105' and msg_no
!='007' then 1 when txn_dir='2' and (( msg_no not in ('141','253') and act_status='02' ) or ( msg_no in ('141','253') and act_
status='01')) then 1 else 0 end=1 and pboc_status = 'PR04' and work_date = to_char(sysdate-1,'YYYYMMDD');
spool off;