[U2] Problem running script from crontab

Having a problem running a Unix script from the crontab.  We use Redhat 
and Unidata 7.1

This script runs fine from command line

UDTHOME=/NTN/CMI
export UDTHOME
UDTBIN=/usr/ud/bin
export UDTBIN
CMIHOME=/NTN/CMI/TRANS4M
export CMIHOME
PATH=$PATH: <at> UDTBIN
export PATH
cd /NTN/DATA/PRODUCTION
$UDTBIN/udt PHANTOM REQIMPORT_MA

But when it is run by the cron it doesn't seem to run.  We do a lot of 
this sort of thing here, but I have never tried running a script that used 
a PHANTOM command like this.  Does anyone see anything obvious here that 
would not let this run from cron?

Charles Shaffer
Senior Analyst
NTN-Bower Corporation
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