- platform = oracle 8.1.6 installed on Windows 98

I have a master script (script1.cmd) that sets a bunch of environment variables and then calls an sql script(script2.sql).
Inside of script2.sql, there are pl/sql blocks which I
would like to use the ENVIRONMENT variables in. How would I
do that?

EG. script1.cmd contents:
=========================
setlocal

set ORACLE_SID=TESTDB
set ORACLE_HOME=C:\ORACLE\ORA81
set KEYWORD=VALID_HOTBKUP_19990131
set SYS_PASS=TEST/TESTPW
start %ORACLE_HOME%\bin\sqlplus %SYS_PASS% @C:\TESTSCRIPTS\script2.sql

endlocal

EG. script2.sql contents:
=========================
-- called from script1.cmd
-- purpose - to generate a sql script with all the
-- 'alter tablespace <tbs name> begin backup;' commands.

-- Inside of this script, I have a spool <filename> and a
-- spool off command.
-- As part of the spool file name, I would like to use
-- the environment variable (KEYWORD=VALID_HOTBKUP_19990131)
-- that I had set in the calling program, script1.cmd.

set serveroutput on size 100000
set trimspool on
set line 500
set head off
set feed off

--BUILD 'ALTER TABLESPACE ... BEGIN BACKUP' CMD SCRIPT

spool D:\TESTSCRIPTS\%KEYWORD%_begin_bkup.sql

declare
dbname varchar2(30);
begin
select name
into dbname
from sys.v_$database;

-- *** this is the spool file name that I would like to
-- *** incorporate the KEYWORD environment variable into
-- *** I thought that I could reference the KEYWORD env
-- *** variable using %KEYWORD%

dbms_output.put_line('spool '||%KEYWORD%||dbname||'.log');

-- Loop through tablespaces
for c1 in (select tablespace_name ts
from sys.dba_tablespaces)
loop
dbms_output.put_line('alter tablespace '||c1.ts||' begin backup;');
end loop;
dbms_output.put_line('spool off');
end;
/
spool off

=========================================================
=========================================================

When the script is run, the following files is created:

D:\TESTSCRIPTS\VALID_HOTBKUP_19990131_begin_bkup.sql
======================

however the contents of this script, generated within the
pl/sql block, the %KEYWORD% is not interpreted as the value
of the KEYWORD environment variable, I was hoping to see
the following contents:

- this line

dbms_output.put_line('spool '||%KEYWORD%||dbname||'.log');

- would be resolved to

spool VALID_HOTBKUP_19990131TESTDB.log
======================

but this did now work.

Any help on this matter would be welcome.

Thanks in advance.