[SwisherSweet]

i suggest instead of unloading those just load into another map,
Also if you wanna destroy the objects use this,

Код:

stock ClearObjects()
{
	for(new i; i<MAX_OBJECTS; i++)
	{
		if(IsValidObject(i)) DestroyObject(i);//ok so look the map does not change. //do you have more than 1 map?
	}
}
stock DestroyAllVehicle()
{
    for(new i=1;i<=MAX_VEHICLES;i++)
	{
    	DestroyVehicle(i);
	}
	return 1;
}

then call it at endmap or that way it will destroy all the objects and vehicles in your currently playing map(when it's switching)