Quick questions after having read the doc: 1. Does error handling works with processes we launch and don't wait for too? I assume yes. 2. I remember pointing before that in this example: execute( run_exe("test.exe"), set_cmd_line("test --foo /bar")); There is repetition of the executable name. I suggested allowing to set_cmd_line() without run_exe(). Did you implement this possibility? 3."On Windows a relative path is relative to the work directory of the parent process. On POSIX a relative path is relative to the work directory set with start_in_dir as the directory is changed before the program starts." Does this means that using start_in_dir on Windows have no effect? 4. There are mentions of the helper facilities but it would be better if their use was explained in the document too. I still think it's problematic to not provide similar behaviour between platforms, but I'm willing to make a first (real application) test and see if I can help improve later. Joel Lamotte