Description: Unexpected error

java.lang.IllegalArgumentException: Cannot create a fluidstack from a null fluid
at net.minecraftforge.fluids.FluidStack.(FluidStack.java:36)
at net.minecraftforge.fluids.FluidStack.(FluidStack.java:67)
at ic2.core.block.personal.ContainerFluidOMatOpen.func_75137_b(ContainerFluidOMatOpen.java:114)
at net.minecraft.client.network.NetHandlerPlayClient.func_147245_a(NetHandlerPlayClient.java:1151)
at net.minecraft.network.play.server.S31PacketWindowProperty.func_148833_a(SourceFile:26)
at net.minecraft.network.play.server.S31PacketWindowProperty.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:273)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1602)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
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:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
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 org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:286)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:376)
at org.multimc.EntryPoint.listen(EntryPoint.java:170)
at org.multimc.EntryPoint.main(EntryPoint.java:54)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Stacktrace:
at net.minecraftforge.fluids.FluidStack.(FluidStack.java:36)
at net.minecraftforge.fluids.FluidStack.(FluidStack.java:67)
at ic2.core.block.personal.ContainerFluidOMatOpen.func_75137_b(ContainerFluidOMatOpen.java:114)
at net.minecraft.client.network.NetHandlerPlayClient.func_147245_a(NetHandlerPlayClient.java:1151)
at net.minecraft.network.play.server.S31PacketWindowProperty.func_148833_a(SourceFile:26)
at net.minecraft.network.play.server.S31PacketWindowProperty.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:273)

Server Version: Cauldron Forge 1.7.10
Forge Version: 10.13.3.1403

Thanks for the answer. But unfortunately I can not downgrade Forge. I'll look forward to when the new Forge will be stable, and you can update the Fluid-O-Mat to a new kind of fluids.

Likely being affected from new fluid system in Forge

Downgrade your forge so low as you can (optimal would be down to the Recomented version) because IC2 uses only stabel forge builds.

No Problem. It is cool that someone uses the fluid o mat xD

At the moment Closed because there is nothing i can do and it should be not spamming the important sutff...