No I/O error in Eclipse

Hi All,

I am a noob here and have been lurking on this forum for a while. I am currently working on a simple game but all of the sudden Eclipse doesn’t want to run it anymore and just spits the “No I/O” message to the Console. I am pretty sure it is some simple setting somewhere but surprisingly Google did not return anything valuable. Instead of spending few hours fooling around with configuration and risking to make more damage I would appreciate any hints?