Minecraft Forums

I just downloaded the FTB launcher. I used the exe version for windows and when I opened it my log came up with these errors:

FTBLaunch starting up (version 1.2.7)
AnalyticsBackgroundThread started
Java version: 1.7.0_45
Java vendor: Oracle Corporation
Java home: C:\Program Files (x86)\Java\jre7
Java specification: Java Virtual Machine Specification version: 1.7 by Oracle Corporation
Java vm: Java HotSpot(TM) Client VM version: 24.45-b08 by Oracle Corporation
OS: x86 Windows 8 6.2
[i18n] Checking for updates ...
[i18n] enUS English language file loaded!
[i18n] Added 0 enUS to options pane
[i18n] enUS English language file loaded!
Error making tracking request: java.net.SocketException: Address family not supported by protocol family: connect
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
[i18n] Could not retrieve version info, skipping update.: java.net.SocketException: Address family not supported by protocol family: connect
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
Failed to load modpacks, loading from backup: java.net.SocketException: Address family not supported by protocol family: connect
Loading modpack information for modpacks.xml...
Failed to read modpack file - falling back to direct download: java.io.FileNotFoundException: C:\Users\Keith Ashby\AppData\Roaming\ftblauncher\ModPacks\modpacks.xml (The system cannot find the file specified)
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
Completely unable to download the modpack file - check your connection: java.net.SocketException: Address family not supported by protocol family: connect
loading map information...
loading texture pack information...
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
Address family not supported by protocol family: connect: java.net.SocketException: Address family not supported by protocol family: connect
Unhandled exception in Thread[Thread-1,5,main]: java.lang.NullPointerException
Address family not supported by protocol family: connect
Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException: -1
Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException: -1

I really don't know what any of this means so I don't know how to fix it, please help.

Thanks comsic, those suggestions worked perfectly!

I had a similar problem. Reinstalling Java worked for me.