If you have an unstripped executable, use dbx and type "where". Dbx will give a stack trace that will help us find the bug if you mail it to Alwyn or Morten (i.e., not to the O mailing list). For example:

        unix> dbx /usr/local/o/bin/ono
        dbx version 2.20
        Copyright 1988, 1989 MIPS Computer Systems Inc.
        Type 'help' for help.
        reading symbolic information ...
        main:    Source not available
        (dbx) where