Error 193 is "%1 is not a valid Win32 application", what is your .Executable or .CommandLine property? -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-TProcess-and-Windows-XP-tp4032239p4032244.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com.