From: "I. P." Date: 2007-03-04T23:32:50+09:00 Subject: Re: Starting applications from Ruby Farrel Lifson DE I. P. FL> Kernel#exec sounds like what you need. This way produced the same result: exec "notepad result.txt" - ruby.exe and notepad.exe were both present. And this way worked just as I want: exec "start notepad result.txt" - ruby.exe closed and notepad.exe is active Thank you! -- I. P. 2007-03-04T17:01