Anytime I try to use one of my blocks as the icon for a custom creative tab, minecraft will crash when I open the creative inventory.

 

I suspect this has to do with order.  I need to have the new creative tab exists before i generate my blocks so I can specify it, but ....  then the block isn't registered by then so it probably puts in a null.

 

Anyone found a way around this?

Your CreativeTabs class has to override getTabIconItem anyways. In there just return the Item...

 

Honestly I forget, don't you have to return the block's default state as well if your item is a block? Or make a new item stack with a block

public static Item getItemFromBlock(Block blockIn)

 

Ill just leave this here

I didn't want to say this till I got home and looked, but I had already done what diesinben07 told me.

 

 

The error for anyone that might run into this, this was the error.

 

Referring the item as instance.Block_Manager.creespsidion crashes

 

Referring the item as Block_Manager.creespsidion works fine.