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Small update

dtinth warned me recently that there was a bug on Macs, which wouldn’t allow you to play, so if you are using a Mac fear no more ! It should work now.

download: Alpha 6.1



  1. I have a question. Can you make a tutorial on how to setup a server with this and make it multiplayer and no Hamachi please. ill just portforward

    • hey there,
      thanks for the interest but we don’t have multiplayer right now, only solo play, like o2mania.

  2. Hey, i need help. When I start open2jam, it still works fine. but after I press play, nothing happens and the music selection screen freezes. I already checked my java and have the latest version installed.

  3. Awesome work. Love it, I dumped my O2Mania ’cause this is way better. Anyway, can you update the O2Jam UI just like O2KR? I mean, the new UI looks good.

    Yeah, I know it’s a bit hard since you have no resources. But another UI should looks good, this old UI is ugly. 😛

    • Well, we are focusing towards giving skin support but it’ll will take a lot of time to finish.

  4. Hello open2jam Staff,
    I’ve got some problems running this on Ubuntu 11.10 (64-bit). When I try to run open2jam.jar, nothing happens. Running it via Terminal reveals the following:
    Exception in thread “AWT-EventQueue-0” java.lang.UnsatisfiedLinkError: Can’t load library: /home/[username]/lib/native/linux/
    at java.lang.ClassLoader.loadLibrary(
    at java.lang.Runtime.load0(
    at java.lang.System.load(
    at org.lwjgl.Sys$

    I downloaded the latest JRE version and tried running it with root rights.
    Any suggestions?
    This works fine on Windows by the way.

    • hey there,

      the problem is that it couldn’t find the library directory, right now, the program is hard-coded to find the libraries on the same directory you are running the jar, so you need the lib/ directory to be in the same path the .jar is.

        • rohen
        • Posted December 7, 2011 at 1:10 pm
        • Permalink

        Thanks for the reply!
        Well, I had it in the same directory as my .jar file, but I found another solution. I copied the .jar file and lib folder into /home/[username] (no sub folders), so it will find the “” inside /home/[username]/lib/native/linux like it says in the terminal.
        Maybe that’s what you meant and I didn’t understand it correctly. If so, I apologize.
        Thanks for the help! And keep on doing this project, it’s awesome and the best way to play O2Jam on Linux!

        • DarkFox
        • Posted December 7, 2011 at 6:56 pm
        • Permalink

        yes, sorry, I meant lib/ needs to be on the working directory, that is, from where you execute the jar. I’m glad you got it to work !

  5. hey guys, nice to know this project is still alive and kicking! I’m sorry I had to leave, but I still check the github repository from time to time 🙂 Keep up the good work!

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