File hosting troubleshooting
If you are having trouble hosting a file
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Make sure your computer is set up for networking. See your network administrator.
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Check to make sure that FileMaker Network Sharing is turned on. (See Sharing databases on a network.)
Other errors and remedies
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If FileMaker Pro is not responding, stop the application and launch it again. If this does not help, restart the computer and try again.
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You can only host FileMaker files that are open on your computer.
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You can’t host from two different instances of FileMaker Pro on the same machine. If two instances of FileMaker Pro are running, quit one and then open the shared file in the remaining running copy.
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Running FileMaker Pro and FileMaker Server on the same computer is not supported. If you see the message “FileMaker cannot share files because another user is already sharing files using FileMaker Pro on this computer,” quit both applications and run only one of the applications.
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Another computer on your network might be using the IP address assigned to you (or vice versa). Check with your network administrator.
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The computer might be set to DHCP with no DHCP server present. Check with your network administrator to verify correct network setup.
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You can’t host if there is a network error. Check with your network administrator.
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If your system is set up for IPv6 but other systems trying to access it are not, revert to using an IPv4 address if possible.
Related topics 
Cannot see hosted databases
Networked database performs slowly
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