Resource temporarily unavailable error?

[MBartner]

I am using arduino-serial for a cross platform application. It worked successfully on OS X, but when I compile it on Windows 7 with Cygwin and try to connect to the arduino with the command

$ ./arduino-serial -b 115200 -p /dev/ttyS2 -r

I am met with the error "Device disconnected. : Resource temporarily unavailable". I am sure the baud rate is correct and the Arduino is connected to COM3, which I found translates to /dev/ttyS2 for cygwin. The only changes I made to the code itself was encapsulating the '-r' (read from serial) functionality in a while loop so it would continuously print output from serial. Any suggestions?