Hi,
I tried using the cron wrapper.
I setup a file with the following in it:
su - oracle <<eof_su
/library/file_transfer/scripts/OraclePing.sh
eof_su
and used the following in the crontab
5,10,15,20,25,30,35,40,45,50,55,0 * * * * /library/file_transfer/scripts/OraclePing.crn
now the script...