Problems with Sync error WCP

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Posts: 8

Hello guys, I have encounter with a problem that i can't find a way to solve it.

I have develop a kind of ability tree. I manage to create all the UI and buttons and works on single player.
But when i create a multiplayer match when i try to give the upgrade to the player, the game crash with a SYNC ERROR.

Here is how it looks the UI, the little box above the doctrine name is a button which calls the upgrade.

Here is the button code.

Code

	--BUTTON
	self._docButtonIcon = nil;
	self._docButton = Button(nil, "ModIcons_e4872dc0e3ff4b6f8bcf957cea423757_demo");	
	self._docButton:setLocation(134, 125);
	self._docButton:setSize(64, 64);
	self._docButton:setCallback(function(tag) 
		self:setSelected(true);
  		Command_PlayerBroadcastMessage(Game_GetLocalPlayer(), Game_GetLocalPlayer(), Doctrine_CHOOSE_CALLBACK, tag)  					
	end)
	self:add(self._docButton);
	--BUTTON

The button calls a Command_PlayerBroadcastMessage who sends to all the players the player who send the menssage.

The messagecallback is this

Code

  	function messageCallback(player, messageType, message)

  		if messageType == Doctrine_CHOOSE_CALLBACK then    
    		if player == LocalPlayer then    			
	    		local doc = BP_GetUpgradeBlueprint(message);
	  			Player_CompleteUpgrade(LocalPlayer, doc);  						
	  			Command_PlayerUpgrade( LocalPlayer, doc , true, false );

	  			doctrinePanelSelected = getSelectedDoctrine(doctrinesPanelsArray);
	  			if doctrinePanelSelected then
		  			local docObjetct = factions[Player_GetRaceIndex(LocalPlayer)].doctrines[doctrinePanelSelected:getIndex()];  							

					abilityPanel:setDoctrine(docObjetct,LocalPlayer);
		  			rootPanel:remove(doctrinePanel1);
					rootPanel:remove(doctrinePanel2);
					rootPanel:remove(doctrinePanel3);
					toogleDoctrine = false;  
				end				
			end
		end
	end

But when i call the "Player_CompleteUpgrade(LocalPlayer, doc);" the game crash with a SYNC ERROR.

Anyone knows a way to do this?? or to avoid the SYNC ERROR.

Or a way to know who is clicking the button

Posts: 756 | Subs: 8

Code

if player == LocalPlayer then

That is why. You should only check if a player is the local player for UI-related functions. Just use the player you are passed in the callback.

Another way to think of it is like this: everything except the UI is synchronized in multiplayer. So, anything that affects ONLY the local player will not be synchronized and cause sync errors to happen.

Also, cool to see someone using my API. Hopefully it has been useful.

Posts: 8

Yes , it has been really usefull , i think i'll implement the new version on the second version of ability tree.

I'll try to figure out how to do the upgrades without that comparison.