"ReggCopy", a test application for file.output class, just copied a file succesfully for the first time. This application simply connects file.stream object with file.output one and runs copying process in the background (file.output object creates a subprocess automatically). Now I work on implementing error reporting, signalling and attributes. ReggCopy will be released with the source code along with file.output class and its documentation as the stage 1 of the bounty.