Core dumps to backtraces

[Mr Guy]

I've got SEVERAL core dumps from opening merchants and SEQ crashing and I'd like to try and generate some useful bt's from them. I googled for how to do it and came up with an answer of using:

gdb <core>
(gdb) bt


This GDB was configured as "i386-mandrake-linux"..."/root/core.10994": not in executable format: File format not recognized

(gdb) bt
No stack.
Any clues?
I'm assuming this has to do with the gcc3 now. Is there also a gdb3 somewhere I should be looking for?

[Mr Guy]

[22:53:09][ ~/RPMS/gdb ]$ rpm -i gdb-5.0-17mdk.i586.rpm
package gdb-5.0-17mdk is already installed
[22:53:22][ ~/RPMS/gdb ]$ gdb --version
GNU gdb 20010813 (MI_OUT)
Copyright 2001 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-mandrake-linux".