I have previously posted this to gnu.gcc.help. It may not be a bug in gdb but someone here may know what is going on... I have been getting the following errors using gdb under Solaris 7 on intel. I have tried both precompiled the version 4.18 from www.sunfreeware.com and also compiling the source myself. As a user: GNU gdb 4.18 Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-pc-solaris2.7"... (gdb) where No stack. Starting program: /export/home/kevin/src/h/hc /proc/618/ctl: Permission denied /proc/618/status: No such file or directory. can't open process file When I try this as root the errors are slight different: (gdb) run/proc/629/ctl: Inappropriate ioctl for device /proc/629/status: No such file or directory. can't open process file Hope you can help, Thanks, Kevin.