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UltimMC / Launcher

Offline Minecraft launcher.
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Problem with local multiplayer #166

Open FruitMaestro opened 2 years ago

FruitMaestro commented 2 years ago

Operating System

Windows

Description of bug

I would like to be able to start and connect two instances of Minecraft on the same computer. Is UltimMC5 able to do that? Tried with 1.16.5 and 1.18.1. Using both local and ely.by accounts. The result was the same.

Steps to reproduce

  1. Starting Minecraft
  2. Singleplayer
  3. Create New World
  4. Open to LAN
  5. Start LAN World
  6. Starting second instance of Minecraft on the same computer
  7. Multiplayer
  8. Join Server
  9. Logging in...
  10. Failed to login

Suspected cause

No idea

This issue is unique

MenacingPerson commented 2 years ago

You have to use different accounts

FruitMaestro commented 2 years ago

You have to use different accounts

I'm using different accounts for both instances.

nfrno commented 2 years ago

Same issue as OP.

MC: 1.18.2 UltimMC: 0.6.14-custom Microsoft OpenJDK: 17.1

Two Windows 10 machines with two unique Local accounts Running instances via Launch Offline Single player world, opened to LAN Server is visible from 2nd PC

Joining leads to timeout after "Logging in..." [Server thread/INFO]: com.mojang.authlib.GameProfile@28583272[id=<null>,name=myName,properties={},legacy=false] (/192.168.1.5:55531) lost connection: Timed out

Curiously, joining works from 3rd machine running ExtremeLauncher 3.9.5.0 with log entry: [User Authenticator #1/WARN]: Authentication servers are down but will let them in anyway! [Server thread/INFO]: myName[/192.168.1.6:55159] logged in with entity id 854 at (9.5, 66.0, -6.5)

Marcelo20XX commented 2 years ago

Same problem as OP, LAN is not working, tried to play with my sister in another city via Radmin, tried with a friend with a second PC connected via LAN cable and finally tried to connect with two copies of the entire folder with the client downloaded and with two different MineCraft accounts on same PC, not working in any of the cases

maxvalit commented 2 years ago

Same problem. Trying to play via LAN, Windows host and OSX client P.S. running on a local account

lucksma96 commented 2 years ago

Same problem, but I'm using Hamachi. Most of the time it fails with Disconnected, but sometimes it's with Timed out. Funny thing is, I'm able to see the server as a LAN World, it shows how many people are connected and the pings work. Local account as well.

aeroncastle commented 2 years ago

this is not a clone of that bug

mariotacke commented 1 year ago

Did you ever figure this out? Got the same issue.

Marcelo20XX commented 1 year ago

I switched to PollyMC because of this issue... sadly that project got its issues too, mainly drama between the devs and collaborators...

mariotacke commented 1 year ago

Gotcha. (How) were you able to create offline accounts without first adding an official account?

MenacingPerson commented 1 year ago

Gotcha. (How) were you able to create offline accounts without first adding an official account?

PollyMC =/= PolyMC

https://github.com/fn2006/PollyMC