Hey, im trying to teleport players to another dimension when right clicking a sign, when the first guy right clicks the sign, its fine, he is teleported and everything, but after that, every time someone tries to use it, he gets an internal server error, BUT the guy who used it the first time can still use it! i have no idea what to do! the error doesn't even point to the dimension teleport!

(i know its the dimension teleport because when i comment it out it doesn't crash).

 

Code of the class: https://gist.github.com/DrPiggy/c9a21adbc9f879a983ff41bea5e2d21a

Error that shows up in the server: https://gist.github.com/DrPiggy/9dc34110ead5bc28e31acdd303dd3dc6

Error in client: https://gist.github.com/DrPiggy/ce68b357f1ef07df8415f9a37840947f

1.7.10 isn't supported here any more, but I'm going to ask this anyway:

 

On these lines here:

https://gist.github.com/DrPiggy/c9a21adbc9f879a983ff41bea5e2d21a#file-commoneventhandler-java-L78-L82

Why do you get the item in the slot s, check that it's not null, and then instead of using the local variable that is the item in slot s, do you get the item in slot s again?

Just now, Draco18s said:

1.7.10 isn't supported here any more, but I'm going to ask this anyway:

 

On these lines here:

https://gist.github.com/DrPiggy/c9a21adbc9f879a983ff41bea5e2d21a#file-commoneventhandler-java-L78-L82

Why do you get the item in the slot s, check that it's not null, and then instead of using the local variable that is the item in slot s, do you get the item in slot s again?

no reason, i can change that, but i am not sure it contributes to the problem, also if 1.7.10 is not supported, where should i ask?

No idea. Forge has moved on. You should update.

 

As for a Null Pointer Exception, those are easy to fix.  Find the thing that is null, figure out why it hasn't been assigned a value.

 

Use your debugger.

Just now, Draco18s said:

No idea. Forge has moved on. You should update.

 

As for a Null Pointer Exception, those are easy to fix.  Find the thing that is null, figure out why it hasn't been assigned a value.

 

Use your debugger.

ah, you shouldn't tell me that, i usually make mods for 1.9, its just my friend's group play on 1.7 and asked me to make them a mod so i said why not, what debugger are you talking about? (unless you mean just output to console by myself every variable and check :P)

 

If you're not using Eclipse, google how to activate the debugger in your IDE.

Just now, Draco18s said:

 

If you're not using Eclipse, google how to activate the debugger in your IDE.

i will try that, thank you.