error("card must be 0-3 for a specific card, or -1 to get frame from all cards.\nSet framing.sync_mode =SYNCMODE_MASTER for one card and =SYNCMODE_SLAVE to obtain synchronized frames.\n");
error("card must be 0-19 for a specific card, or -1 to get frame from all cards.\nSet framing.sync_mode =SYNCMODE_MASTER for one card and =SYNCMODE_SLAVE to obtain synchronized frames.\n");