Hi, I found `open-network-stream' doesn't work with an integer for the fourth argument. It can be reproduced with XEmacs 21.4.17 built in at least the Fedora Core 4 system (but there's no problem in some other platforms, e.g., Solaris 2.6). For instance, the following form causes an error: (delete-process (open-network-stream "POP" (current-buffer) "popserver" 110)) Debugger entered--Lisp error: (error "popserver/'D & Servname not supported for ai_socktype") open-network-stream-internal("POP" #<buffer "*scratch*"> "popserver" 110 nil) open-network-stream("POP" #<buffer "*scratch*"> "popserver" 110) We can use this function with only a string which specifies a port number as follows: (delete-process (open-network-stream "POP" (current-buffer) "popserver" "110")) Naoto Morishima investigated it in detail and made the patch, and I confirmed it works in the Fedora Core 4 system. 2005-11-24 Naoto Morishima <naoto(a)dl.naist.jp&gt; * process-unix.c (unix_open_network_stream): Make it work with an integer for the fourth argument. --- process-unix.c~ 2005-02-13 21:58:19 +0000 +++ process-unix.c 2005-11-24 10:53:07 +0000 ＠＠ -1684,13 +1684,13 ＠＠ volatile int xerrno = 0; volatile int failed_connect = 0; char *ext_host; + char portbuf[128]; /* * Caution: service can either be a string or int. * Convert to a C string for later use by getaddrinfo. */ if (INTP (service)) { - char portbuf[128]; snprintf (portbuf, sizeof (portbuf), "%ld", (long) XINT (service)); portstring = portbuf; port = htons ((unsigned short) XINT (service));