Serial port freezing..

Hi,

I am working with sweep-ros on Jetson TX2(R28.1). Recently, I could not get topic from sweep lidar and found that 'sweep_node' freeze at following line:

//Create Sweep Driver Object
sweep::sweep device{serial_port.c_str()};
 
I can show scan data via 'Sweep Visualizer', so lidar is working correctly(It seems like issue #17)
What should I do for checking problem?

Thanks,

James 