Hazrock

Update: it seems that the game will randomly start up normally, but only occasionally.

your entire log is NOT needed to find the error. lets break it down: java.lang.NullPointerException <-- means something doesn't exist that should. codechicken.nei.NEIServerConfig.canPlayerUseFeature <-- where the error happened, lets break that down further. codechicken.nei <--- so the error is in NEI .NEIServerConfig <--- obviously something to do with the config .canPlayerUseFeature <--- sounds like permissions to me, of course this isn't necessarily true. one line down, just before the error happened: codechicken.nei.NEIServerPacketHandler.sendPermissableActionsTo <-- this is where NEI tells the player what they can and cannot do, such as spawn items, change weather, heal, creative, etc. Now I'm no expert in server configs, but it sounds to me like they are messed up. But in my opinion, throwing a NullPointerException because of a bad config is not good practice, so idk if this is the case. tl;dr: check your NEI config files :D

Update: tried running under jre6 & jre7, no success. :/

Launcher Version: 1.0.1.3 Operating System: Windows XP 2002 edition service pack 3 Java Version: 1.7.0_04-b22, also tested with 1.6.0_35-b10, error log otherwise identical. Antivirus Program: Avast! Description of Problem: Vanilla minecraft runs fine, but tekkit freezes for me before the mojang logo appears on screen. I am not using the "latest lwjgl build" option. Deleting META-INF in jinput.jar let me run tekkit flawlessly, but only once. (these were both suggested solutions in the "common problems and solutions" tread) I have since tried wiping the whole .techniclauncher folder, clearing the cache, and re-installing, then deleting meta-inf again. I even tried copying the lwjgl jars and natives folder from my vanilla install over. nothing worked. Before this, just in case it is related, I got the "could not authenticate account" error for the technic launcher, but not for vanilla, until it miraculously started going through. Also, my graphics card is a NVIDIA GeForce FX 5200, just in case it is necessary for those "pixel format not accelerated" errors below. However, vanilla minecraft runs fine on this same hardware. Error Messages: none, just a white screen. Error Log: [23:39:35] [sEVERE] Launcher is starting.... [23:39:35] [sEVERE] Launcher Build: '1.0.1.3' [23:39:35] [sEVERE] Allocated 989.875 Mb of RAM [23:39:35] [sEVERE] Java VM: '1.7.0_04-b22' [23:39:35] [sEVERE] OS Version: '5.1' [23:39:35] [sEVERE] Is 64-bit: 'false' [23:39:36] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'. [23:39:36] [sEVERE] Starting download of 'http://mirror.technicpack.net/Technic/CHECKSUM.md5', with 3 trie(s) remaining [23:39:37] [sEVERE] Copying: \temp\file8701252819341108597.tmp to: \launcher\CHECKSUM.md5 [23:39:37] [sEVERE] File Downloaded: \launcher\CHECKSUM.md5 [23:39:37] [sEVERE] [MD5 Mismatch] File '\launcher\tekkit\modpack.yml' has md5 of '46a0900a4753fad02650edb182ed5670' instead of '032eedc7183acde5b75cd13f9ff2e324' [23:39:38] [sEVERE] [info] Downloading 'modpack.yml' from 'http://206.217.207.1/Technic/tekkit/modpack.yml'. [23:39:38] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://mirror.technicpack.net/Technic/minecraft.yml'. [23:39:45] [sEVERE] Loading Launcher from 'techniclauncher/tekkit' [23:39:56] [sEVERE] org.lwjgl.LWJGLException: Pixel format not accelerated [23:39:56] [sEVERE] at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) [23:39:56] [sEVERE] at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) [23:39:56] [sEVERE] at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:185) [23:39:56] [sEVERE] at org.lwjgl.opengl.Display.createWindow(Display.java:311) [23:39:56] [sEVERE] at org.lwjgl.opengl.Display.create(Display.java:856) [23:39:56] [sEVERE] at org.lwjgl.opengl.Display.create(Display.java:784) [23:39:56] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:360) [23:39:56] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:738) [23:39:56] [sEVERE] at java.lang.Thread.run(Unknown Source) [23:39:57] [sEVERE] org.lwjgl.LWJGLException: Pixel format not accelerated [23:39:57] [sEVERE] at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) [23:39:57] [sEVERE] at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) [23:39:57] [sEVERE] at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:185) [23:39:57] [sEVERE] at org.lwjgl.opengl.Display.createWindow(Display.java:311) [23:39:57] [sEVERE] at org.lwjgl.opengl.Display.create(Display.java:856) [23:39:57] [sEVERE] at org.lwjgl.opengl.Display.create(Display.java:784) [23:39:57] [sEVERE] at org.lwjgl.opengl.Display.create(Display.java:765) [23:39:57] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:375) [23:39:57] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:738) [23:39:57] [sEVERE] at java.lang.Thread.run(Unknown Source) [23:40:07] [sEVERE] A critical error has occurred. [23:40:07] [sEVERE] Exception in thread "Minecraft main thread"; [23:40:07] [sEVERE] java.lang.RuntimeException: sidedDelegate null when attempting to getMinecraftLogger, this is generally caused by you not installing FML properly, or installing some other mod that edits Minecraft.class on top of FML such as ModLoader, do not do this. Reinstall FML properly and try again. [23:40:07] [sEVERE] at cpw.mods.fml.common.FMLCommonHandler.getMinecraftLogger(FMLCommonHandler.java:358) [23:40:07] [sEVERE] at cpw.mods.fml.common.Loader.<init>(Loader.java:138) [23:40:07] [sEVERE] at cpw.mods.fml.common.Loader.instance(Loader.java:129) [23:40:07] [sEVERE] at uu.<init>;(PanelCrashReport.java:25) [23:40:07] [sEVERE] at n.a(SourceFile:38) [23:40:07] [sEVERE] at net.minecraft.client.Minecraft.b(Minecraft.java:300) [23:40:07] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:743) [23:40:07] [sEVERE] at java.lang.Thread.run(Unknown Source) Edit: got rid of the stupid &quot;'s