Launcher crashes before Mojang screen

[amag1234]

Launcher Version: 242

Operating System: Windows 8 Surface Pro

Java Version: 1.7.0_21

Antivirus Program:

Description of Problem:

I select a modpack (any modpack) and click Launch and then the launcher closes and the FML thing opens up, and then it closes itself and does nothing else. I tried using the console while the launcher loaded, and the last thing the console said before closing itself was "Accesor Unsafe". This started after I installed the latest Windows update. I uninstalled the update but that didn't help. I have tried clearing the cache and it didn't help either. I also installed a Java update around the same time and I think also an update for the launcher but I'm not sure. Also, I tried using the .jar launcher and when it got to the minecraft update part it said "Update Failed" and stopped.

Error Messages:

Error Log:

[09:34:55] [sEVERE] ------------------------------------------

[09:34:55] [sEVERE] Launcher is starting....

[09:34:55] [sEVERE] Launcher Build: '1.1.2.0'

[09:34:55] [sEVERE] Allocated 989.875 Mb of RAM

[09:34:55] [sEVERE] Java VM: '1.7.0_21-b11'

[09:34:55] [sEVERE] OS Version: '6.2'

[09:34:55] [sEVERE] Is 64-bit: 'false'

[09:34:56] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'.

[09:34:56] [sEVERE] Downloading 'http://206.217.207.1/Technic/CHECKSUM.md5'

[09:34:57] [sEVERE] Downloaded 'launcherCHECKSUM.md5'

[09:34:57] [sEVERE] [MD5 Mismatch] File 'launchermodlibrary.yml' has md5 of 'c70362a5c404c742609450bbd7d84e7c' instead of '186ae070b11b1b728641906828bf917b'

[09:34:57] [sEVERE] [info] Downloading 'modlibrary.yml' from 'http://206.217.207.1/Technic/modlibrary.yml'.

[09:35:05] [sEVERE] [info] Downloading 'modpack.yml' from 'http://mirror.technicpack.net/Technic/voltz/modpack.yml'.

[09:35:06] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://mirror.technicpack.net/Technic/minecraft.yml'.

[09:35:23] [sEVERE] voltzbinnatives does not exist! Updating..

[09:35:23] [sEVERE] Modpack version requested '1.0.11' does not match installed version 'null'! Updating..

[09:35:23] [sEVERE] 'basemods-voltz-v1.0.10.zip' has MD5 mismatch! Updating..

[09:35:23] [sEVERE] Starting download of minecraft, with 3 trie(s) remaining

[09:35:28] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:35:28] [sEVERE] Starting download of minecraft, with 2 trie(s) remaining

[09:35:33] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:35:33] [sEVERE] Starting download of minecraft, with 1 trie(s) remaining

[09:35:37] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:35:37] [sEVERE] java.io.IOException: Failed to download minecraft

[09:35:37] [sEVERE] at org.spoutcraft.launcher.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:54)

[09:35:37] [sEVERE] at org.spoutcraft.launcher.GameUpdater.updateMC(GameUpdater.java:124)

[09:35:37] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:826)

[09:35:37] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:808)

[09:35:37] [sEVERE] at javax.swing.SwingWorker$1.call(Unknown Source)

[09:35:37] [sEVERE] at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

[09:35:37] [sEVERE] at java.util.concurrent.FutureTask.run(Unknown Source)

[09:35:37] [sEVERE] at javax.swing.SwingWorker.run(Unknown Source)

[09:35:37] [sEVERE] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

[09:35:37] [sEVERE] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

[09:35:37] [sEVERE] at java.lang.Thread.run(Unknown Source)

[09:35:51] [sEVERE] voltzbin does not exist! Updating..

[09:35:51] [sEVERE] Modpack version requested '1.0.11' does not match installed version 'null'! Updating..

[09:35:51] [sEVERE] 'basemods-voltz-v1.0.10.zip' has MD5 mismatch! Updating..

[09:35:51] [sEVERE] Starting download of minecraft, with 3 trie(s) remaining

[09:35:57] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:35:57] [sEVERE] Starting download of minecraft, with 2 trie(s) remaining

[09:36:02] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:36:02] [sEVERE] Starting download of minecraft, with 1 trie(s) remaining

[09:36:06] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:36:06] [sEVERE] java.io.IOException: Failed to download minecraft

[09:36:06] [sEVERE] at org.spoutcraft.launcher.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:54)

[09:36:06] [sEVERE] at org.spoutcraft.launcher.GameUpdater.updateMC(GameUpdater.java:124)

[09:36:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:826)

[09:36:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:808)

[09:36:06] [sEVERE] at javax.swing.SwingWorker$1.call(Unknown Source)

[09:36:06] [sEVERE] at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

[09:36:06] [sEVERE] at java.util.concurrent.FutureTask.run(Unknown Source)

[09:36:06] [sEVERE] at javax.swing.SwingWorker.run(Unknown Source)

[09:36:06] [sEVERE] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

[09:36:06] [sEVERE] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

[09:36:06] [sEVERE] at java.lang.Thread.run(Unknown Source)

[09:36:30] [sEVERE] voltzbin does not exist! Updating..

[09:36:30] [sEVERE] Modpack version requested '1.0.10' does not match installed version 'null'! Updating..

[09:36:30] [sEVERE] 'basemods-voltz-v1.0.10.zip' has MD5 mismatch! Updating..

[09:36:30] [sEVERE] Starting download of minecraft, with 3 trie(s) remaining

[09:36:36] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:36:36] [sEVERE] Starting download of minecraft, with 2 trie(s) remaining

[09:36:40] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:36:40] [sEVERE] Starting download of minecraft, with 1 trie(s) remaining

[09:36:44] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:36:44] [sEVERE] java.io.IOException: Failed to download minecraft

[09:36:44] [sEVERE] at org.spoutcraft.launcher.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:54)

[09:36:44] [sEVERE] at org.spoutcraft.launcher.GameUpdater.updateMC(GameUpdater.java:124)

[09:36:44] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:826)

[09:36:44] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:808)

[09:36:44] [sEVERE] at javax.swing.SwingWorker$1.call(Unknown Source)

[09:36:44] [sEVERE] at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

[09:36:44] [sEVERE] at java.util.concurrent.FutureTask.run(Unknown Source)

[09:36:44] [sEVERE] at javax.swing.SwingWorker.run(Unknown Source)

[09:36:44] [sEVERE] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

[09:36:44] [sEVERE] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

[09:36:44] [sEVERE] at java.lang.Thread.run(Unknown Source)

[09:37:04] [sEVERE] voltzbin does not exist! Updating..

[09:37:04] [sEVERE] Modpack version requested '1.0.11' does not match installed version 'null'! Updating..

[09:37:04] [sEVERE] 'basemods-voltz-v1.0.10.zip' has MD5 mismatch! Updating..

[09:37:04] [sEVERE] Starting download of minecraft, with 3 trie(s) remaining

[09:37:12] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:37:12] [sEVERE] Starting download of minecraft, with 2 trie(s) remaining

[09:37:17] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:37:17] [sEVERE] Starting download of minecraft, with 1 trie(s) remaining

[09:37:22] [sEVERE] Downloaded 'minecraft.jar' does not matche MD5 of any known minecraft version!

[09:37:22] [sEVERE] java.io.IOException: Failed to download minecraft

[09:37:22] [sEVERE] at org.spoutcraft.launcher.MinecraftDownloadUtils.downloadMinecraft(MinecraftDownloadUtils.java:54)

[09:37:22] [sEVERE] at org.spoutcraft.launcher.GameUpdater.updateMC(GameUpdater.java:124)

[09:37:22] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:826)

[09:37:22] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm$3.doInBackground(LoginForm.java:808)

[09:37:22] [sEVERE] at javax.swing.SwingWorker$1.call(Unknown Source)

[09:37:22] [sEVERE] at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

[09:37:22] [sEVERE] at java.util.concurrent.FutureTask.run(Unknown Source)

[09:37:22] [sEVERE] at javax.swing.SwingWorker.run(Unknown Source)

[09:37:22] [sEVERE] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

[09:37:22] [sEVERE] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

[09:37:22] [sEVERE] at java.lang.Thread.run(Unknown Source)

[09:37:28] [sEVERE] Exiting the Technic Launcher

[amag1234]

Also I tried uninstalling everything and deleting every file related to minecraft, technic, or voltz (the only mod I play) and then redownloading it and it still doesn't work

[Exo7icMonk3y]

exact same thing with me someone help!!!!!

[Actonawhim]

I'm having the same problem. The first time I tried to open a modpack, it got to the Mojang screen but then quit after a few seconds. After that, it never got to that point at all, it would show FML loading and then everything would quit. I tried deleting and re-downloading, but nothing has changed. I have a MacBook Pro with version 10.8.3 installed. Not sure what the java version is, but any help would be greatly appreciated.

[Actonawhim]

UPDATE:

I think I found a solution (though it may only be for macs, I'm not sure).

So I checked my java version, and it was Java 7. Using these instructions I reverted back to Java 6. Upon reopening Technic Launcher I was able to open the vanilla version successfully. The other modpacks have yet to be attempted.

For Windows, instructions on reverting back to Java 6 can be found here.

Hope this helps!

[Actonawhim]

UPDATE TO THE UPDATE:

The modpacks seem to be working fine, though it does take a minute for the Mojang screen to transition.

[WHYUNOWORK]

same issue here while using java 7 but when reverted to 6 i couldn't get launcher to even work at all.... Mac users get screwed on everything when it comes to games

[amag1234]

So I think that on my computer it is because of a windows update, because I wiped my computer completely and then reinstalled technic and everything worked, but then I got the windows update and it stopped working again.

[mattbrap]

same with me everytime I launch a mod pack eg.tekkit classic and it says updating minecraft.jar but then it just says stopped responding and crashes :L