A. Reading through all the duck-computer jokes was probably the best part of my day, the only reason I ever stopped laughing was so I could read the next one. If I wasn't broke from tuition I'd pay you guys for more.
B. I'm having this exact problem but with all of the modpacks. (edit: I say all but I really only mean Hexxit and Tekkit, haven't played any of the others yet)
Launcher Version: 365
Operating System: Windows 7
Java Version: 1.7.0_45 or Version 7 Update 45, whichever format you prefer
I haven't had any problems until 11/27/2013 when they all just quit working; as the original poster said, I click to play a modpack and it loads up until the load bar says version.json and then it quits.
These are the error logs I get:
2013/11/28 00:23:46 [iNFO] ------------------------------------------
2013/11/28 00:23:46 [iNFO] Technic Launcher is starting....
2013/11/28 00:23:46 [iNFO] Launcher Build: 365
2013/11/28 00:23:46 [iNFO] ------------ Startup Parameters ------------
2013/11/28 00:23:46 [iNFO] --------- End of Startup Parameters ---------
2013/11/28 00:23:47 [iNFO] Analytics Response [runLauncher]: 200
2013/11/28 00:23:48 [iNFO] Starting download of http://skins.technicpack.net/helm/Cathartic_Scot/100, with 3 tries remaining
2013/11/28 00:23:49 [iNFO] Valid:
2013/11/28 00:23:49 [iNFO] Launcher took: 3151ms to start
2013/11/28 00:23:56 [WARNING] File version.json not found in C:UsersColinAppDataRoaming.technicmodpackstekkitmainbinmodpack.jar
2013/11/28 00:23:56 [iNFO] Starting download of http://mirror.technicpack.net/Technic/version/1.5.2/1.5.2.json, with 3 tries remaining
2013/11/28 00:24:00 [sEVERE] java.io.FileNotFoundException: C:UsersColinAppDataRoaming.technicmodpackstekkitmainbinnativesOpenAL32.dll (Access is denied)
2013/11/28 00:24:00 [sEVERE]at java.io.FileOutputStream.open(Native Method)
2013/11/28 00:24:00 [sEVERE]at java.io.FileOutputStream.<init>(Unknown Source)
2013/11/28 00:24:00 [sEVERE]at java.io.FileOutputStream.<init>(Unknown Source)
2013/11/28 00:24:00 [sEVERE]at net.technicpack.launchercore.util.ZipUtils.unzipEntry(ZipUtils.java:102)
2013/11/28 00:24:00 [sEVERE]at net.technicpack.launchercore.util.ZipUtils.unzipFile(ZipUtils.java:159)
2013/11/28 00:24:00 [sEVERE]at net.technicpack.launchercore.install.ModpackInstaller.installLibrary(ModpackInstaller.java:228)
2013/11/28 00:24:00 [sEVERE]at net.technicpack.launchercore.install.ModpackInstaller.installVersionLibs(ModpackInstaller.java:200)
2013/11/28 00:24:00 [sEVERE]at net.technicpack.launchercore.install.ModpackInstaller.installPack(ModpackInstaller.java:82)
2013/11/28 00:24:00 [sEVERE]at org.spoutcraft.launcher.InstallThread.run(InstallThread.java:60)
2013/11/28 00:24:22 [iNFO] Maximum usable memory detected: 8173 mb
Would really love a fix, kind of going through tekkit withdrawals.