Cant Open Instance

[ghost]

When I try to open any instance I have I get this error:

Exiting with -1
Failed to find Minecraft main class:
java.lang.ClassNotFoundException: net.minecraft.client.main.Main
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:132)
at org.multimc.EntryPoint.listen(EntryPoint.java:127)
at org.multimc.EntryPoint.main(EntryPoint.java:52)
Minecraft exited with exitecode -1.

Please help, I dont know what to do!

[taljaards]

I also had that issue.
Do you have any accented characters in you Windows Account name (such as é ë ü ...) ?

[ghost]

not accented, but like a hidden folder with ALT+0+2+5. Do you think thats the problem?

[ghost]

Huh, thats weird, I just moved the MultiMC folder to the desktop and now it seems to open, the new update must have broken that, oh well, thank you Mierzen :)

[taljaards]

Just as I was typing the reply :)

[peterix]

Try the current dev build. Does it work?