How to add mods in Eclipse?

[Old_Conestone]

Hello,

 

I will add some mods in eclipse because I want to program a pipeline which carries fluids and for that I need existing tanks and api's.

So I added Buildcraft, Industrialcraft and Railcraft to my Mods/ folder and run eclipse. Then it starts, loads all mods and crashes:

java.lang.NoSuchMethodError: net.minecraft.command.ICommand.func_71517_b()Ljava/lang/String;

It happens to each mods, even when I add only one mod.

 

Can anyone help me to add mods and an api?

 

I know that today started another thread about api's (http://www.minecraftforge.net/forum/index.php/topic,31525.0.html), but it wasn't helpful because I haven't got a "src/api" folder in my forge folder.

[Busti]

All of these mods should have dev versions you can download.

In order to add these but them into the libs folder. Some also have source files you can add. APIs also belong there.

If a mod doesn't have a dev version, put it in the libs folder anyways.

Re run gradlew setupDecompWorkspace in order to add the librarys.

[Old_Conestone]

Thank you so much!

I actually programmed 430 lines of code only for rendering the pipelines with ISBRH and then I stumbled over this easy problem... 

 

Thank you