Hello. I am having a problem with my FTB Ultimate client.
Whenever I am playing (both single and multiplayer), my cleint just randomly closes to the desktop (no error message in client). There is an error report created on my desktop. You can find the file at https://dl.dropboxus...err_pid8988.log.
This has been happening for a long while now. Some times, it runs fine for hours on end, others it crashes within 30 seconds of starting. It gets rather annoying when you are in the middle of something, then have to wait for a minute for everything to reload.
Intel I7 3820 3.6GHz Quad
NVidia GTX 580 Classified (3GB onboard RAM)
I am running optifine with my client, but the crashes occur both with and without optifine (no noticable difference in crashes).
I give my client 12GB of RAM, mainly because I can, but also so I can run 128 bit texture packs without any issue (besides the issue mentioned in this post).