The second argument of

NBTTagCompound#getTagList

is the tag type that the list contains. You should use the constants from the

Constants.NBT

class instead of an integer literal.

 

I'd also recommend removing the

TileEntityChemicalMixer.ID

field, there's no reason for it to exist.

 

As I said before, you should be using

IItemHandler

instead of

IInventory

.

From memory:

 

It is the type of

NBTTag

inside the

NBTTagList

. 10 stands for

NBTTagCompound

.

Thanks man, now its working...but one little question I have anymore. Why is there a 10: NBTTagList list = compound.getTagList("ItemStacks-" + ID, 10);

in:

@Override
public void readFromNBT(NBTTagCompound compound) {
	super.readFromNBT(compound);
	NBTTagList list = compound.getTagList("ItemStacks-" + ID, 10);
	this.inv = new InventoryBasic("Chemical Mixer", false, 3);
	for(int i = 0; i < list.tagCount(); i++){
		NBTTagCompound tag = list.getCompoundTagAt(i);
		byte b = tag.getByte("Slot");
		if(b >= 0 && b < inv.getSizeInventory()){
			inv.setInventorySlotContents(b, ItemStack.loadItemStackFromNBT(tag));
		}
	}
}

The 10 there states it is saving ItemStacks not anything else.

 

*Edit Don't mind me just being kinda brain dead....

The 10 there states it is saving ItemStacks not anything else.

 

No:

 

10 stands for

NBTTagCompound

.