hi, if any one could help me with this it'd be great, when i go to port checker tools they all say im open on 25565, but when i run my server it says, "failed to bind port, perhaps a server is already running on that port"
have you tried checking task manager to see if another java program is running already? Also a simple restart of the computer can clear up some of those issues, if you don't feel comfortable ending task on certain programs.
i assure you im not already running a server
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Advanced Guide to server-ip and server-port settings.