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New Survival Project

Hello there,
we are a little group of beginner developers, with an idea and started to develop it.
It will be a Multiplayer game, then i studied how to do it; and take inspiration by (https://docs.unrealengine.com/latest/INT/Resources/Showcases/BlueprintMultiplayer/index.html) and (https://forums.unrealengine.com/showthread.php?60345-BP-UMG-Menu-System-4-7-w-network&highlight=UMG+menu).

Actually i’m locked with Host function, i hope someone can help us; i try to explain what i did step by step, so you can understand.

1)Create blueprint third person project;

2)Create an IstanceGame blueprint, an Enumeration called “State” http://prntscr.com/6kj5h8 and a folder with 2 widgets: MainMenu and loading screen;

3)Put right GameInstance blueprint called ProjectInstance in Project Settings http://prntscr.com/6kjl5m;

4)Create Main Menu widget called MM with Host button (http://prntscr.com/6kj8s6) and Quit button (http://prntscr.com/6kj91c)

5)For main menu open the blueprint of empty level called MM_Temp (http://prntscr.com/6kjg87), create function inside gameinstance blueprint (http://prntscr.com/6kjgou), create Show Main Menu (http://prntscr.com/6kjam9), creating a variable called CurrentState type State, made 2 macro (http://prntscr.com/6kjaz9) and (http://prntscr.com/6kjbto)

6)Create Loading Screen widget (http://prntscr.com/6kjd3c), function inside gameinstance blueprint (http://prntscr.com/6kjdmi)

7)Host Game (http://prntscr.com/6kjcq2).

Result if i play in a new window: http://prntscr.com/6kjhvu, click on Host and the application lock here http://prntscr.com/6kjic2 show my message error from creation session.

nobody know how to build host function?

Problem Solved!