"output truncate" in OEM job

Hi,

I have a script to spool a huge select result, for example:
"spool result.txt;
select * from emp;
spool off;
"
The records are over 20000 lines.

This script execute well through sql*plus command line, but when I use OEM job to run it, the job failed because of "output truncate".

Could anyone has good idea?
Thanks!

-Betty

Check metalink, there is a config file you can amend to up the default limit, but I can't for the life of me remember what it is.