FM prevents apple computer from shutting down

I have 20 computers set to shut down automatically each evening and reboot each morning.  it isn't practical to manually do this 365 days a year.  Th problem I'm running into is that when FM is running, it blocks this shut down process and puts the apple computer into a weird state where it is trying to shut down but fails.

Is there a setting in FM or in FM server or in apple Os X Yosemite that will make FM quit first? 

Is there an apple script that any one knows that can be run on a timer to shut down FM Pro before the shut down sequence starts?