Whenever I right click a custom block I created, no matter what the action (Sysout, addChatMessage, etc.) it will run twice. I am trying to create a simple block that will open a custom crafting GUI upon right click, but it opens and closes when clicked on.

 

All I have in the method is 'p.displayerGUIWorkbench(0,0,0);'

 

Thanks in advance for your help.

It is firing once on the client, and once on the server.

 

You will need to add some world.isRemote checks and only run the action on the proper side. 

 

 

Also, I believe that the container workbench has some code in it to auto-close if the player is out of range of the workbench, which is set via the (0,0,0) you are passing in...so unless the player is standing at 0,0,0 or near to it, it will close shortly after opening.

 

vanilla workbench code that causes the closing in ContainerWorkbench:

    public boolean canInteractWith(EntityPlayer par1EntityPlayer)
    {
        return this.worldObj.getBlock(this.posX, this.posY, this.posZ) != Blocks.crafting_table ? false : par1EntityPlayer.getDistanceSq((double)this.posX + 0.5D, (double)this.posY + 0.5D, (double)this.posZ + 0.5D) <= 64.0D;
    }

You can's use the displayGUIWorkbench, because some code in the ContainerWorkbench checks for a workbench at the location you specify, and if there isn't, you can't open the gui.