When I try to access Data, Trends, I get: Warning: No tables found for selected collector.

Log into the web interface and select menu Status->Collectors->Detail. Check if your collector is running (green LED indicator). If you will see a red LED indicator, nfcd process is not running!

If nfcd process is not running, you have to check if your license is OK by going to Help->Licenses. If the License is OK and program is still not running you have to start nfcd process manually. Log into Linux environment and run the following command:

/etc/init.d/nfcd restart

This command will run the collector(s). You can also see errors or warnings in the system log file (syslog), check if there are any problems with running the collector by using the command:

less /var/log/syslog | grep nfc