java.lang.IllegalStateException: Not building!

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java.lang.IllegalStateException: Not building!
at net.minecraft.client.renderer.VertexBuffer.func_178977_d(VertexBuffer.java:713)
at net.minecraft.client.renderer.Tessellator.func_78381_a(SourceFile:21)
at net.minecraft.client.renderer.RenderItem.func_175045_a(RenderItem.java:164)
at net.minecraft.client.renderer.RenderItem.func_175036_a(RenderItem.java:135)
at net.minecraft.client.renderer.RenderItem.func_180454_a(RenderItem.java:198)
at net.minecraft.client.renderer.RenderItem.func_184390_a(RenderItem.java:439)
at net.minecraft.client.renderer.RenderItem.func_184391_a(RenderItem.java:478)
at net.minecraft.client.gui.GuiIngame.func_184044_a(GuiIngame.java:1192)
at net.minecraftforge.client.GuiIngameForge.func_180479_a(GuiIngameForge.java:329)
at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1369)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1076)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

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