Cannot run any service commands from nagios 3.0

I do not see any of the command programs in their expected location either. Was I supposed to install these seperately? i.e.“re-schedule then next check of this service”, I click on it, force check and click ‘commit’ and ‘Error: Could not open command file ‘/usr/local/nagios/var/rw/nagios.cmd’ for update!’ There are no files in the rw folder when I go to that location.

please advise.

Check the nagios.cfg file and see in it if there is defined nagios.cmd file. I not, you should do so. Check the documentation and set it up correctly:
nagios.sourceforge.net/docs/3_0/extcommands.html