Pryotra

Sorry to double post, but I fixed this problem by deleting the launcher.jar and re-running the launcher updater.exe. Apparently it managed to corrupt itself, getting a new copy solved it.

Launcher Version: Latest from the front page. Operating System: Windows 7 64-bit Java Version: 7u10 Antivirus Program: Comodo Description of Problem: I tried starting up the launcher as usual, and I get a box saying "checking launcher version" shortly followed by the error. I had it working not 20 minutes previous, with no changes in Java or Comodo or anything. I double checked to ensure my Java was up to date, and still no progress. I know my firewall is configured correctly, as it was working earlier without even touching it, but I did check to ensure this was not the case. I can't even get to the login screen, and I can login to the normal Minecraft launcher from Mojang, so this is not related to their servers. Help would be appreciated, though I might have to go get myself dinner soon, so if I don't give an immediate response I apologize. Error Messages: Unable to download launcher. Please check your internet connection by opening up www.techniclauncher.net in your webbrowser. Error Log: [17:12:16] [sEVERE] ------------------------------------------ [17:12:16] [sEVERE] Launcher is starting.... [17:12:16] [sEVERE] Launcher Build: '1.0.3.4' [17:12:16] [sEVERE] Allocated 910.25 Mb of RAM [17:12:16] [sEVERE] Java VM: '1.7.0_05-b06' [17:12:16] [sEVERE] OS Version: '6.1' [17:12:16] [sEVERE] Is 64-bit: 'true' [17:12:28] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'. [17:12:28] [sEVERE] Starting download of 'http://206.217.207.1/Technic/CHECKSUM.md5', with 3 trie(s) remaining [17:12:29] [sEVERE] Copying: \temp\file64963729468360339.tmp to: \launcher\CHECKSUM.md5 [17:12:29] [sEVERE] File Downloaded: \launcher\CHECKSUM.md5 [17:12:32] [sEVERE] [MD5 Mismatch] File '\launcher\hackslashmine\modpack.yml' has md5 of 'c0f8895f32f316fd384f3bd5f791c6e6' instead of 'fc658483012963bf32a57f8b8f9b402c' [17:12:32] [sEVERE] [info] Downloading 'modpack.yml' from 'http://206.217.207.1/Technic/hackslashmine/modpack.yml'. [17:12:34] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://206.217.207.1/Technic/minecraft.yml'. [17:13:21] [sEVERE] Loading Launcher from 'techniclauncher/hackslashmine' [17:16:12] [sEVERE] java.lang.NullPointerException [17:16:12] [sEVERE] at ack.p(SourceFile:84) [17:16:12] [sEVERE] at ack.c(SourceFile:63) [17:16:12] [sEVERE] at vl.a(GuiScreen.java:138) [17:16:12] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:625) [17:16:12] [sEVERE] at xo.a(SourceFile:119) [17:16:12] [sEVERE] at vl.a(GuiScreen.java:99) [17:16:12] [sEVERE] at vl.f(GuiScreen.java:167) [17:16:12] [sEVERE] at vl.i(GuiScreen.java:153) [17:16:12] [sEVERE] at net.minecraft.client.Minecraft.k(Minecraft.java:1600) [17:16:12] [sEVERE] at net.minecraft.client.Minecraft.x(Minecraft.java:819) [17:16:12] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:727) [17:16:12] [sEVERE] at java.lang.Thread.run(Unknown Source) [17:16:52] [sEVERE] java.lang.NullPointerException [17:16:52] [sEVERE] at ack.p(SourceFile:84) [17:16:52] [sEVERE] at ack.c(SourceFile:63) [17:16:52] [sEVERE] at vl.a(GuiScreen.java:138) [17:16:52] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:625) [17:16:52] [sEVERE] at xo.a(SourceFile:119) [17:16:52] [sEVERE] at vl.a(GuiScreen.java:99) [17:16:52] [sEVERE] at vl.f(GuiScreen.java:167) [17:16:52] [sEVERE] at vl.i(GuiScreen.java:153) [17:16:52] [sEVERE] at net.minecraft.client.Minecraft.k(Minecraft.java:1600) [17:16:52] [sEVERE] at net.minecraft.client.Minecraft.x(Minecraft.java:819) [17:16:52] [sEVERE] at net.minecraft.client.Minecraft.run(Minecraft.java:727) [17:16:52] [sEVERE] at java.lang.Thread.run(Unknown Source) [17:17:04] [sEVERE] java.lang.NullPointerException [17:17:04] [sEVERE] at ack.p(SourceFile:84) [17:17:04] [sEVERE] at ack.c(SourceFile:63) [17:17:04] [sEVERE] at vl.a(GuiScreen.java:138) [17:17:04] [sEVERE] at net.minecraft.client.Minecraft.a(Minecraft.java:625) [17:17:04] [sEVERE] at ack.a(SourceFile:189) [17:17:04] [sEVERE] at acu.a(SourceFile:46) [17:17:04] [sEVERE] at vl.a(GuiScreen.java:99) [17:17:04] [sEVERE] at acu.a(SourceFile:64) [17:17:04] [sEVERE] at vl.f(GuiScreen.java:167) [17:17:04] [sEVERE] at vl.i(GuiScreen.java:153) [17:17:04] [sEVERE]

I have this exact problem too, started happening about an hour after you posted this ironically enough. I have had it installed for a few days now, and was running it fine less than an hour ago.