I finally got to the root mail to see what errors crontab was finding with running this script. I have crontab calling ann01.sh script and the script is running. 
The ann01.sh and prompt01.gsm files are in /etc/asterisk/scripts. Both files and the scripts folder are set as executable.
The ann01.sh script is as below:

#!/bin/bash
# Script plays prompt01 audio files over local node (repeater)
# Runs "localplay prompt01.gsm via IAX or radio *970

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/sbin/asterisk/

/usr/sbin/asterisk -rx "rpt localplay /etc/asterisk/scripts/prompt01"  # error "can't open ann01"


sudo asterisk -rx "rpt fun 42996 *970"                             # error "can't open ann01"
asterisk -rx "rpt fun 42996 *970"                                      # error "can't open ann01"
/usr/sbin/asterisk -rx "rpt fun 42996 *970"                       # error "can't open ann01"
echo "Hello World" >> test                                               # runs fine!

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I can hit *970 on the radio and hear the localplay run the prompt01 speech.
I can type ann01 via ssh and the prompt01 is heard.
I just can't get the ann01.sh script to run from cron!

Help!
Duane KA1LM