Invalid address when trying to run the client at boot

I have the client running as a service on a raspberry pi running Bookworm.  If I execute a list, I get: 

pi@piprod:~ $ /usr/sbin/vhclientarm64 -t "LIST"
VirtualHere Client IPC, below are the available devices:
(Value in brackets = address, * = Auto-Use)

Raspberry Hub (pivh:7575) 
  --> SPE 1.5k (pivh.112) 
  --> Rotator (pivh.114) (In-use by you)

Auto-Find currently on
Auto-Use All currently off
Reverse Lookup currently off
Reverse SSL Lookup currently off
VirtualHere Client is running as a service

The addresses are always the same.

If I execute the following command, it connects and everything is fine:  /usr/sbin/vhclientarm64 -t "USE,pivh.114" -r="/home/pi/vh.log" 

However, when I run that command from Cron at boot, I get "Invalid Address"

I thought that maybe the service wasn't running yet so I created a script:

while ! systemctl is-active --quiet virtualhereclient.service; do sleep 1; done; 
echo "About to run command" 
/usr/sbin/vhclientarm64 -t "USE,pivh.114" -r="/home/pi/vh.log" 

If I run the script after boot, all is fine.  However, when I run the script from Cron it fails with "Invalid Address"  I even tried putting a 30 second wait at the beginning of the script but no joy.  I'm sure you know what's going on but I've spent hours on this.  Your help is much appreciated.