showAlliedObjective()
{
	if(self.pers["team"] == "allies")
	{
		num = self getentitynumber(); 
		objective_add(num, "current", self.origin);
		//objective_team(1,"axis");
		objective_position(num, self.origin);
		
		for(;;)
		{
			objective_position(num, self.origin);
		
			if(!isAlive (self) )
			{
				objective_delete(1);
				return;
			}
		
			wait .3;
		}
	}
}

This for is causing strange things: first that the allie is not able to change weapon, team etc, and second, that and axis player gets suddenly shocked and damaged :S.

Well I can see an issue with how your using objective_add. Your meant to use special slot number for objectives, which is returned with this function (in CoD4).

objectiveID = maps\mp\gametypes\_gameobjects::getNextObjID();

There should be a similar function in CoD2. Also, you aren't using the correct objectiveID in the objective_delete. It should be the same ID that is used in the objective_add function.

I dont know if there is a similar function in CoD2. Maybe somebody here know.

Yes right, objective_delete(1); should be objective_delete(num);, i didnt noticed, but the issue persists!

I simplified the code:

showAlliedObjective()
{
	num = self getentitynumber(); 
	
	objective_add(num, "current", self.origin);
	
	while(1)
	{
		objective_position(num, self.origin);
		wait .3;
	}
}

But its the same, I cant click on Change weapon / Team ...

The while is the problem!

Where are you running this function from? And how? It sounds as if you are not threading the code.

As regards the objective number you need to keep a track of which of the available numbers are available (0-15). Some of these will be used by gametypes. Do not use the player's entity number as this may go outside of the allowed range.

As mentioned previously you can only have up to 16 objective icons at any time (indexes 0-15).

We need to know where this is being threaded, and how it is handled before we can fix the issues.

spawnPlayer()
{
        [...]

	waittillframeend;
	
	self showAlliedObjective();
	
	self notify("spawned_player");
}

No more then 16 objectives are allowed? :S Is there not any possibility of increasing the number, or using an other way of displaying the icons? Like the green triangles maybe...

16 is a hardcoded limit. You could change the Green Triangle image, but it would affect all players.

What I want is that a team see the position of all the players of the other team.

You must thread the function - this will solve your weapon changing problem I suspect:

self thread showAlliedObjective();

As for your aim - it isn't possible unless there are 16 players or less in the server, and if running something like S&D which uses 3 or 4 icons then the limit is lower. The only way I can think of doing it is to use the red enemy dots and fiddle with the cvars to try and stop it fading after a certain amount of time, but I'm not sure if this would work.