On Wed, 29 Dec 2004 12:04:19 +0100, Reinhard Sy <reinhard@xxxxxxxxxxxxxxxx> wrote: > Now I am using S-PLUS ( Statistics Software). If I start the software as > follows: > > *rsy@puffin*[11:33][~][5]> Splus -e > cled: can't open master pty ("/dev/ptyq0"): No such file or directory This sounds like the software you are using is coded to very old Unix standards. The old /dev/pty[qrst]? devices files haven't been around for a while. The Unix98 standard introduced a new and better way for programs to allocate pseudo master/slave terminate devices. Read: man pts This likely isn't a udev thing. In fact it's not really specific to just Linux, except that Linux finally has dropped support for the old deprecated interfaces. Many other non-Linux Unices have also adopted the new way as well. Do you have source to the application? -- Deron Meranda