Won't launch any Modpack

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Caprizze

New Member
Jul 29, 2019
3
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Title:
Won't launch any Modpack
Launcher Version:
1.4.7
Modpack:
Lite3 / Ifinity
Modpack Version:
doesnt matter
Log Link:
Details of the issue:
When i want to start any modpack the console says:

[10:47:15] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
[10:47:17] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
[10:47:17] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
[10:47:18] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
[10:47:20] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
[10:47:20] [ERROR] unknown location->Main$8.uncaughtException:401: Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
 

swestrup

New Member
Jul 29, 2019
7
1
3
I am having the exact same problem. So have other folks. Is it an issue with downloading the pack lists from the server?
 

Kerrisimo

Member
Jul 29, 2019
1
0
15
Having the same issue. This is the launcher console report each time launch is pressed. Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException
 

Xygen8

New Member
Jul 29, 2019
16
0
0
Same here. It also happens when you select the "Maps & Textures" tab in the launcher.
 

Sketchy Pyjamas

New Member
Jul 29, 2019
14
0
0
Same here. Sometimes restarting the launcher will fix it. Just now, I had to restart the launcher 4 times to get it to work.
 

furiousgeorge

New Member
Jul 29, 2019
1
0
0
If you're using windows:

Go to the location where your FTB_Launcher.exe is located.

Right click on the file, select properties.

At the bottom of the window, above the OK, Cancel, Apply buttons, there is a section that should contain 2 buttons on the right hand side. One of those will say, "Unblock". Click that button, then click 'OK' and try again.
 
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malicious_bloke

Over-Achiever
Jul 28, 2013
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If you're using windows:

Go to the location where your FTB_Launcher.exe is located.

Right click on the file, select properties.

At the bottom of the window, above the OK, Cancel, Apply buttons, there is a section that should contain 2 buttons on the right hand side. One of those will say, "Unblock". Click that button, then click 'OK' and try again.

I just got a new machine and a fresh install of the FTB launcher and the latest version of Java. I was getting this error in the console when trying to launch packs.

The above fixed it <3
 

Xygen8

New Member
Jul 29, 2019
16
0
0
If you're using windows:

Go to the location where your FTB_Launcher.exe is located.

Right click on the file, select properties.

At the bottom of the window, above the OK, Cancel, Apply buttons, there is a section that should contain 2 buttons on the right hand side. One of those will say, "Unblock". Click that button, then click 'OK' and try again.

There is no "Unblock" button. It has checkboxes for "Read Only" and "Hidden". What I did was check both of those boxes, hit apply, then uncheck them and hit apply again, and set the file to run as administrator. It's working now. However, I don't know which one of these two steps fixed the problem, or if you need to do both.
 
Last edited:

Padfoote

Brick Thrower
Forum Moderator
Dec 11, 2013
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If you are having a similar problem please create your own thread; many of these solutions are based on specific configurations and will not work for all. OP, if you need this reopened, PM me.

Thanks.
 
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