DDD 3.3.12 (i386-apple-darwin14.5.0) gets Xt error

When I run ddd on my mac OS X Yosemite, it shows the following error:
Error: Unresolved inheritance operation

Xt error (Unresolved inheritance operation).

Oops!  You have found a bug in DDD.


The following is the log file:

GNU DDD 3.3.12 (i386-apple-darwin14.5.0)
Copyright (C) 1995-1999 Technische Universität Braunschweig, Germany.
Copyright (C) 1999-2001 Universität Passau, Germany.
Copyright (C) 2001 Universität des Saarlandes, Germany.
Copyright (C) 2001-2009 Free Software Foundation, Inc.

Compiled with GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)
Requires X11R6, Xt11R6, Motif 2.3.4 (Motif Version 2.3.4)
Includes XPM 3.4.11, Athena Panner (7000002L), Manual, App defaults, DDD core
Built 2017-05-24 by (unknown).
$  ddd domain_read.cpp.out
!  Xt error: Unresolved inheritance operation
!  Xt error
!  Cannot save options

Could you help me to fix it?

Thanks!

Lixin