public void close()
	{
		if( blockvec != null )
		{
			blockvec.clear();
			blockvec = null;
		}
		if( (nextblock != null) && (!nextblock.equals( this )) )
		{
			nextblock = null;
		}
		mystore = null;
		if( data != null )
		{
			data.clear();
			data = null;
		}
	}