private void checkValidility(OptAinet optAinet)
	{
		if(ranNetworks.isEmpty() && !isSuppressErrors)
		{
			System.err.println("ERROR: List of running/ran OptAiNet is empty.");
			System.exit(-1);
		}
		else
		{
			if(optAinet.getReference() < 0 && !isSuppressErrors)
			{
				System.err.println("ERROR: Given OptAinet not found in the data manager.");
				System.exit(-1);
			}
		}
	}