[1.8] [Solved] NPE while Opening GUI

[HassanS6000]

I'm trying to create a GUI for a TileEntity on Minecraft 1.8. Basically I want to be able to put in a single book that has been written in, otherwise open the book inside. I am stuck with the GUI allowing you to enter the book.

 

However, I keep getting an Null Pointer Exception from the Slot class:

http://pastebin.com/tDE1wAwP

 

My code:

Container: http://pastebin.com/9R5MrmG5

Gui: http://pastebin.com/YdCg8wtN

Gui Handler: http://pastebin.com/tDwbBj41

Block: http://pastebin.com/UKtR0WtT

 

Any ideas and help would be greatly appreciated! 

[FLUFFY2]

If you could show me your tile entity class, i could help.

 

Few things to notice:

-You open gui, in onBlockActivated() without checking if its a client. The code will crash the server.

-Why you open your gui inside your tile entity?

 

I suggest you to route your gui opening throught your ClientProxy, it can slove your poblem.

You can use: Minecraft.getMinecraft().displayGuiScreen(new Gui(player));

[HassanS6000]

Figured it out with help from IRC, it was because my inventory was null in my TileEntity

[FLUFFY2]

Yeah okay, still watch out for side checking when you open your gui, because it can cause a crash when you fire up a server.

 

Glad you figured it out!