This typically happens when you have something in there that is for the wrong version of minecraft.
Remove everything including your mods and coremods folder. And start fresh.
Yes it works just fine -.- It even downloads those versions of MCP for you.
And the logs will give you more information even if it thinks your mod isnt a valid mod, it will tell you.
Unless you installed things wrong.
Humm my eyes must of missed that in the build log, however:
Outputted net/minecraft/client/gui/achievement/GuiAchievements to reobf/minecraft as aux.class
Seems you're right.
So this a non-critical issue if users cant copy over aux as it's just the achievement pages. Achievements still work just you wont be able to see them in the normal page.
We do not ship the aux class.
And if you install things properly, archiving tools do not exctract everything from the target zip.
So, you need to figure out how you wanna handle it, aux should never be extracted to your disc.
If you STILL can't figure it out, just use MultiMC
DO NOT extract all your classes, just drag the shit directly from one zip to the other.
If that doesn't work, use MultiMC.
Windows does not allow files with the name 'aux' so if you try to extract it, it'll fuck shit up.
Forge is completely ML compatible unless you screw up the install or the modder is completely retarded.
So i'm gunna assume you screed something up.
Without logs we can't help you.
bdm is TileEntitySpecialRenderer
We are not moving the rendering code to the server -.-
One or more of your mods is being stupid and isn't server compatible.
I am unable to reproduce anything like this, i'd need more information, specifically things like your computer specs, world seed, are you generating a new world or loading a old, etc..
There can be a lot of things that can cause this, all of whch are user error:
1) Make sure you don't ahve any !'s in the path to the folder
2) You don't need to extract or move anything from the forge zip to the server jar, just run the forge zip with minecraft_server.jar in the same folder and it'll work.
This issue is that java cant find all of forge's stuff, so.. you somehow installed it wrong.