HP Navigator: Data collection for cell 'cell_xxxxx' error occurred.

Just installed the 60-day evaluation of HP Navigator, but I am getting an error when it runs to collect the data:

Data collection for cell 'cell_xxxxxx-dp' error occurred.

I have HP Navigator (v9.20) running under RedHat linux v6.5 in a VM against DP v7.03 CM running on Windows.

I have stopped the firewall (service iptables stop) to see if it's a firewall issue, but it still fails.

I have added the HP NAVIGATOR IP address to the HOSTS file on the DP cell as the VM isn't in DNS as yet.

Both servers can ping each other, and some reports seem to complete successfully.

Any assistance would be appreciated.

I have attached the agent_util_cmd..log logfile, but obsucrred the server name(s).

Thanks.