I have just spent 2 hours trying to figure this out.
I currently have fmp17 installed on my computer, When i try and run a script via a url it states" unable due to can't find host or file is share ....."
I have since rebooted & restarted, clear the nvram etc. but as soon as i open the filemaker file it comes up with the warning" Filemaker cannot share files because another user is already sharing files using filemaker pro advanced on this computer"
I dont have a second person logged in on this computer and the file is stored locally.