Okay so I recently updated my server to 1.3.1 since a lot of my members did not know how to downgrade their jar to 1.2.5 even I gave them a step to step instruction. Anyways I started my server and it ran completely smoothly until I/anyone else logs in on minecraft it shows downloading terrain forever and on the console it says the person logs in. However whenever I type in a command (such as list) on the console after the person logged in, nothing shows up on the console and I get a message on the console shortly after saying something like a fatal error has been discovered by the java runtime environment. I've seen people being able to update their server to 1.3.1 perfectly without people crashing it. Oh and the console replies to me before anyone logs into the server, but it wont work after people log in. These are the plugins that I have: World Portal Orebfuscator GroupManager MultiInv WorldEdit NoCheatPlus VoxelSniper Buycraft Backup Vault bLift WorldGuard dynmap VoxelUpdate BoatMod iConomy DailyBonus Lockette Votifier MobDisguise Essentials WorldBorder Citizens EssentialsProtect EssentialsSpawn VanishNoPacket VotifierScripts EssentialsChat Factions Dynmap-Factions AntiCheat This is what happens when I type /version on the console: 2012-08-04 22:08:01 [INFO] This server is running CraftBukkit version git-Bukkit-1.2.5-R5.0-22-ga4b1e01-b2291jnks (MC: 1.3.1) (Implementing API version 1.3.1-R0.1-SNAPSHOT) This is what I have on the batch file: @Echo OFF SET BINDIR=%~dp0 CD /D "%BINDIR%" java -Xmx3072M -Xms3072M -jar craftbukkit.jar PAUSE and yes I have renamed my craftbukkit dev build jar into craftbukkit.jar And this is the Java crash log: please help! its a bit long.. http://pastebin.com/kxFqR2Da Its been doing that ever since I updated the jar file and its perfectly fine when I install the older craftbukkit jar back (1.2.5 RC-5.0).. I should have done something really wrong since other servers that I play on (craftedmovie) doesn't seem to have problems with craftbukkit. please help! its still not working after I redownloaded the craftbukkit file EDIT by Moderator: merged posts, please use the edit button instead of double posting.