I looked at the env. and it seems to me that every thing is in the PATH, This is a new box, and I checked out the old box and everything seems to be the same. Here is the path and the script, It does work fine if you run it manually. It seems like it is choking on the /sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk0a >>&/etc/dump_log because first it never writes to the file and if I do a ps -ef | grep dump after the scheduled time nothing shows up.
PATH=/sbin:/usr/sbin:/usr/bin:/usr/bin/X11:/admin/wp51/wpbin/:/admin/wp51/shbin:/usr/ud/bin:/usr/local:/usr/udms:/usr/udms/etc
#! /bin/csh
# /etc/back_up 7-25-05
# Use restore -ivf /dev/tape/tape0_db0 -s x (x = volume to be restored from)
# for file by file restores.
# Remember to rewind tape between restores when restoring different
# filesystems(volumes).
# Also, check fs using df to make sure tape does not fill up.
# Check /etc/backup_date for start and stop times and
# /etc/dump_log for play by play dump status info
#
echo > /etc/backup_date
echo > /etc/dump_log
#
echo starting full backup at `date` >> /etc/backup_date
#
#
echo starting dump of: / filesystem at `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk0a >>&/etc/dump_log
echo dump of: / finished at `date` >> /etc/backup_date
#
echo starting dump of: /usr filesystem `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk0g >>&/etc/dump_log
echo dump of: /usr finished at `date` >> /etc/backup_date
#
echo starting dump of: /db1 filesystem `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk1b >>&/etc/dump_log
echo dump of: /db1 finished at `date` >> /etc/backup_date
#
echo starting dump of: /db2 filesystem `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk2b >>&/etc/dump_log
echo dump of: /db2 finished at `date` >> /etc/backup_date
#
echo starting dump of: /db3 filesystem `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk3b >>&/etc/dump_log
echo dump of: /db3 finished at `date` >> /etc/backup_date
#
echo starting dump of: /unidata filesystem `date` >> /etc/backup_date
/sbin/dump 0fsu /dev/ntape/tape0 1000000 /dev/disk/dsk4b >>&/etc/dump_log
echo dump of: /unidata finished at `date` >> /etc/backup_date
#
# Notify sytems administrators
mailx -s "dump done: admin4"
admin@admin.com < /etc/dumpdates