mnn

are you sure about the memory? when I tried 512MiB for 2 people after some time (or during generation of unexplored chunks) it crashed on not enough memory (but also I'm using some plugins/extra mods, so it might be their fault). not really sure, how aggresive garbage collection in java is, but after few hours of playing server uses over 70% of assigned ram (~1.5GiB).

are mods' files present in mods directory (USER_DIR\AppData\Roaming\.techniclauncher\tekkit\mods\)? if not, try re-downloading tekkit (changing version in launcher to other and then back, it should download all files again).

yea, got same problem (same version, linux 32b). "solved" it by not using item tele pipes (power ones seem ok) - I've replaced all item tele pipes with ender chests and so far it works nicely.

try updating LWJGL ;-) http://www.minecraftwiki.net/wiki/Tutorials/Update_LWJGL

I'm guessing you have old java. Make sure you have installed Java 7 (running command "java -version" should return version 1.7) and only this version (or remove older version from PATH environment variable).

running tiny server for 2 players on dual-core 2.9GHz, tekkit has assigned 2GiB. it rarely uses more than 40% of one core. we have one nuclear reactor (a ton of solar panels), 2 sorting facilities (with automatic maceration and smelting), 3 quarries, piston pig farm and a few farm stuff from forestry, so nothing too hard on cpu (we're primarily using redpower tubes and ender chests to avoid long and stuffed pipes). i think it realy depends on what you're going to build..

just to be sure - you are trying to set-up a tekkit server? (it's not exactly clear from the post) if so, what's your network topology (e.g. server -> router -> adsl modem)? can you connect from the same pc or from some pc on same network? no warnings/errors in console/log file?

http://forums.technicpack.net/threads/upgraded-to-3-1-2-now-lots-of-console-spam-fix-inside.18092/

same problem described there -> http://forums.technicpack.net/threads/bad-chunk-issue.23739/, no solution so far :-/

# Problematic frame: # C [OpenAL64.dll+0x6220] alSourcei+0x144 OpenAL64.dll is a part of LWJGL library, maybe try different version? [or possibly audio files could be corrupted, but that would be unlikely if many of your friends have same problem (assuming tekkit was installed using launcher on all machines).] (files are located at "USER_DIR\AppData\Roaming\.techniclauncher\tekkit\bin\", other versions can be found here - http://sourceforge.net/projects/java-game-lib/files/Official%20Releases/. don't forget to backup all files you're messing with!)

I read somewhere that the crashing GUI occurs when a player is OP. Have you tried de-opping self?

0.5GiB ram doesn't seem enough. I'm hosting similar server as you (for 1-2 players) and even when nobody is there it uses over 0.6GiB. I really think that windows runs out of memory and start swapping to hardrive.. (MC with HD texture pack should have 1.5-2GiB, server's recommended minimum is around 1GiB and chrome can easily use tens [with flash and java even hundreds] of MiB for every tab) btw runnig bukkit with 512MiB produces this: 2012-09-11 12:06:16 [WARNING] **** NOT ENOUGH RAM! 2012-09-11 12:06:16 [WARNING] To start the server with more ram, launch it as "java -Xmx1024M -Xms1024M -jar minecraft_server.jar"

It's ok in single player (technic), but in SMP (tekkit) the CT3 crashes server. (Actually I might said it wrong before, it's probably because of forge version - the tekkit guys decided that new IC2 has higher priority, so until CT3 is compatible with "new" forge version it's not gonna work.)

it had (has?) a good reason, it's incompatible with IC2 I think. grab QuickBench plugin, it's not that fancy as CT3 but better than a classic table ;)

correct. stop server, delete map (the "world/" directory) and start server. it will generate a brand new map.