Minecraft Forums

@GingerGirl
A long shot but....Are you per chance running AVG Anti-Virus?

Okay getting low down.

1) Stop the server
1a) Backup your map.
2) Rename the minecraft_server.jar to something else like "Minecraft_server_Stock.jar"
3) Upload the snapshot 'minecraft_server.jar'
4) Restart the server

Too many reasons for you to be kicked out of minecraft, Please list more details like error code, any specific mods you might be running etc.

My 2 cents.
Not much experiance with this stufff but....
Starters: If java is saying that you cannot access a jar file and you've clearly put a '.exe' file, I'm pretty sure that it would throw a error.
You should use '.jar' if it is really a JAR File. Otherwise, Just run the exe.

Second: In response to your command prompt not showing the version of java, You need to add the java exe to your environment variables to be able to just type 'java -version'. Try the full path instead if you want to access the version.
I.e : "C:\Program Files\Java\jre7\java.exe -version"

At about 8:38, He adds some code to the end of the line.

Maybe that would help?

I'm having some problems with the Forge API

The installation of the Forge API on top of the MCP decompiled code causes some errors in the source code
Namely:

Description	Resource	Path	Location	Type
bufferSize cannot be resolved to a variable	Tessellator.java	/Client/src/net/minecraft/src	line 30	Java Problem
Cannot make a static reference to the non-static field byteBuffer	Tessellator.java	/Client/src/net/minecraft/src	line 430	Java Problem
digSlowdown cannot be resolved or is not a field	EntityPlayer.java	/Server/src/net/minecraft/src	line 483	Java Problem
digSpeed cannot be resolved or is not a field	EntityPlayer.java	/Server/src/net/minecraft/src	line 479	Java Problem
Duplicate field Tessellator.byteBuffer	Tessellator.java	/Client/src/net/minecraft/src	line 386	Java Problem
Duplicate field Tessellator.intBuffer	Tessellator.java	/Client/src/net/minecraft/src	line 387	Java Problem
i cannot be resolved to a variable	Tessellator.java	/Client/src/net/minecraft/src	line 30	Java Problem
potionDigSlow cannot be resolved or is not a field	EntityPlayer.java	/Client/src/net/minecraft/src	line 535	Java Problem
potionDigSpeed cannot be resolved or is not a field	EntityPlayer.java	/Client/src/net/minecraft/src	line 531	Java Problem
The method addTileEntity(Collection) in the type World is not applicable for the arguments (TileEntity)	Chunk.java	/Server/src/net/minecraft/src	line 593	Java Problem
The method setBrightness(int) is undefined for the type Tessellator	EffectRenderer.java	/Client/src/net/minecraft/src	line 128	Java Problem
useVBO cannot be resolved to a variable	Tessellator.java	/Client/src/net/minecraft/src	line 27	Java Problem

Note these are only some, most of them are duplicate errors in the same location*(Within 10 lines of each other).

Any ideas on what is causing this?

EDIT: I'm using MCP 4.4, Decompiled Minecraft 1.8.1 with Modloader and I'm using Eclipse
Running Windows 7 x64

To those who are experiancing an error related to:

'xcopy' is not recognized as an internal or external command,operable program or batch file.

You need to have added 'C:\Windows\System32' to your 'Path' System Variable.
Details to how to add below.

On a scale of 1 to 10, with 10 being quite easy and 1 being a completely alien world, How hard would it be to for a confident C# coder to grasp with Java and get a mod up and running?