So I use FTB Ultimate v1.1.2 (MC v1.4.7) with all the standard mods installed (nothing added, nothing removed)
FTB is constantly crashing on me. Sometimes it will lag, and then freeze, and other times it will crash when I teleport to a waypoint or enter a portal with my portal gun.
When it lags and freezes, it will pop up with the usual error screen, but only for about 1/4 of a second, and then close.
When I use a waypoint/portal gun, and then use a gregtech machine, it will freeze, and pop up with a message saying "Shutting Down Internal Server". It will freeze on this screen, and I'll have to go into task manager to close it.
I am playing single player, and usually on LAN (to enable teleportation.)
I don't use optifine or anything else.
My computer's specs, if this helps:
Intel Core i5 3210M @2.5Ghz (up to 3.1Ghz)
Intel HD 4000 Graphics with 512MB allocated VRAM.
8GB DDR3 RAM @1600Mhz
128GB Samsung 840 Pro SSD
Windows 8.1 Pro 64-bit
Java v7.0.250 (32 and 64 bit)
I also have problems where I can't see mobs on my minimap. Right now it's working fine, but sooner or later they will disappear, and I can't figure out how to make then reappear. All mobs are enabled on my settings page.
This is the most recent error log.