Minecraft Forums

Hello,

I am having a problem with my Minecraft launcher. When it is about to launch, I displays a FATAL ERROR message

Here is the full log:

Bootstrap (v5)
Current time is Aug 1, 2014 5:29:36 PM
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_51'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'

Found cached update
Renaming C:\Users\Jack!\AppData\Roaming\.minecraft\launcher.pack.lzma.new to C:\Users\Jack!\AppData\Roaming\.minecraft\launcher.pack.lzma
Unable to rename - could be on another filesystem, trying copy & delete.
Copy & delete succeeded.
Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 2588ms
Didn't find an update in time.
Reversing LZMA on C:\Users\Jack!\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\Jack!\AppData\Roaming\.minecraft\launcher.pack
FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: LZMA.LzmaException: LZMA : Data Error
at net.minecraft.bootstrap.Bootstrap.unpack(Bootstrap.java:146)
at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:123)
at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)

I would really appreciate it if you could help, I have had this problem for ages!!

Thank You

-Pancake

Try restarting your computer. If that doesn't work, go to the search part of your computer, and look up %appdata% go to the .minecraft folder. Go to the saves folder and put all those folders on your desktop. Then delete the .minecraft folder. Run minecraft and go into single player. Then go into the new .minecraft folder, then the saves, and put those folders back in. That should help.

Quote from Nick_r_cole

Try restarting your computer. If that doesn't work, go to the search part of your computer, and look up %appdata% go to the .minecraft folder. Go to the saves folder and put all those folders on your desktop. Then delete the .minecraft folder. Run minecraft and go into single player. Then go into the new .minecraft folder, then the saves, and put those folders back in. That should help.

Thanks for your help, but unfortunately I have never run minecraft on my computer before, so there is nothing in the .minecraft folder
Thanks anyways

Quote from cestislife

You have an exclamation mark in your Windows username, which is causing the issue.

Having exclamation marks or other special characters in your Windows username can break Java, which in turn breaks Minecraft. To fix this issue, either create a new Windows account without any special characters (only A-Z and 0-9), or change the working directory of the launcher.

See http://hopper.minecraft.net/help/special-characters/ for more information on working around this problem.

It worked!!! Thank you so much!!!