DDD 3.3 (sparc-sun-solaris2.8) gets Xt error

[Vipin Agrawal]

First run after install!!

GNU DDD 3.3 (sparc-sun-solaris2.8)
Copyright (C) 1995-1999 Technische Universit\344t Braunschweig, Germany.

Copyright (C) 1999-2001 Universit\344t Passau, Germany.

Compiled with GCC 2.95.2 19991024 (release), libstdc++ 2.8.0
Requires X11R5, Xt11R5, Motif 2.1 (Motif Version 2.1.0)
Includes Athena Panner, DDD core
Built 2001-10-04 by Vipin Agrawal <vipin@sipackets.com>.
$  ddd
+  /bin/sh -c 'exec gdb -q -fullname'
!  Xt error: attempt to add non-widget child "Separator1" to parent
"main_window" wh
ich supports only widgets
!  Xt error