On Apr 19 20:14, Lutz H?rl wrote: > Hello, > > thank you Dave, thank you Larry. > > But unfortunately your advice to use "//./devX" did NOT solve the problem.
No, it can't. When using the Win32 device names, the files are not recognized as devices by Cygwin but instead they are treated like normal files. If you want Cygwin support, you must use POSIX device names. If you want to access the serial interfaces using Win32 functions anyway, I'd suggest to use Win32 functions throughout and not rely on Cygwin. This already begins with using CreateFile instead of open. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Co-Project Leader mailto:[EMAIL PROTECTED] Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/