sqlplus exit statement prematurely terminates unix script

[tngoe]

echo ""
echo "Enter person ID:"
read person_id
sqlplus -silent '/nolog'<<end_sql 1
connect useract/passwd
start $BANNER_LINKS/gurlsid.sql
$person_id
FAISMGR
end_sql1
cat person.lst >person_list
sqlplus -silent '/nolog'<<end_sql 2
connect useract/passwd
start $BANNER_LINKS/gurlsid.sql
$person_id
FIMSMGR
end_sql2
cat person.lst >>person_list
sqlplus -silent '/nolog'<<end_sql 2b
connect useract/passwd
spool person
set feedback off
column "Table Name" format a12
column "Column Name" format a30
column "Count" format 9999
column "Condition" format a32
select 'FOBTEXT' "Table Name",
'FOBTEXT_CODE' "Column Name",
count(fobtext_c ode) "Count",
'WHERE FOBTEXT_DTYP_SE Q_NUM = 73' "CONDITION"
from fobtext
where fobtext_code = '$person_id'
and fobtext_dtyp_se q_num = 73
having count(fobtext_c ode) > 0;
spool off
exit
end_sql2b
#--------------------------
cat person.lst >>person_list
echo ""
echo "finish my program"

*******
the last three statements did not execute at all. The last file(person.lst ) has something, but it didn't append to person_list. Also the last two echo didn't display on the screen either. I think somehow when exiting from sqlplus, it just exited out of the script completely.

Can someone indicate why the last three statements of this script did not carry out?

Thanks,
Trang