[1.7.2] Name of fields in Material.class

[Googleman 0]

Hello. When I start client with my mod, I get crash:

cpw.mods.fml.common.LoaderException: java.lang.NoSuchFieldError: air
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:691)
at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:288)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:527)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:815)
at net.minecraft.client.main.Main.main(SourceFile:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoSuchFieldError: air

 

Code in my mod:

BlockBase block = new BlockBase(Material.air);

 

How should I write name of material??

Material.***

 

I would be very thankful for the help 

[larsgerrits 510]

You probably exported it wrong. You need to export it using

gradlew build

from the command line (inside the forge folder).

[Googleman 0]

I'm did this

[diesieben07 6441]

Your mod did not get reobfuscated. Did you change your build.gradle?

[sequituri 118]

Sounds like an incorrect import of Block.