aHenn

There, narrowed down to your problem area... Though all that says is that your minecraft.jar is bugged, does not exist, launcher couldn't be bothered/bugged out of reading it properly, etc... Maybe get a backup supply of various versions of MC.jar for such a purpose as overwriting the one in the technic folder. Hope that helps. Well I tried, but has not worked, and I've been giving a bit of a search around for an older version of NEI (why am I finding this unnecessarily difficult?) Currently working through my log files, of which there are 3... And for some strange reason are taking 20-30mins to load, despite not being that large. Anyway the first one mentioned NEI as the cause for bugging out. Waiting for the second one... all in good time. EDIT: I have got to looking around a bit more, and this thread seems to be the specific bug thread for the problem, so will check up on and post in there in future.

Hello I felt this issue was worth signing up to this forum for, as I experience an extremely similar problem with it. Description: I am running Ubuntu Linux for my OS, using OpenJDK7 for the Java environment. I got through the initial update error, wherein it decided to work second time round (only change was switching from manual to automatic build in the launcher options). However it still would not start up Voltz, displaying the white screen, plus the second JVM window entitled 'Hello', before finally crashing after a few seconds, displaying a window telling me to consult the log (which I have yet to properly open as the log file is immense and ungainly for my old computer). My current line of thinking is that this error is resultant from it having the current newest build of Minecraft.jar (now 1.4.7), and will soon attempt to install MC 1.2.* or even 1.3.*... However cannot do this right away and felt that putting in this post should broadcast to anyone who may have better insight in to this issue. Thank you for reading this to the end! NB: I had already tried the NEI mod 'fix' mentioned above. Has not worked, but perhaps if the issue is related, I may try another version of NEI.