DDD 3.3.12 (i386-apple-darwin14.4.0) gets Xt error

The error:

id102:src adrianstan$ ddd
Error: Unresolved inheritance operation

Xt error (Unresolved inheritance operation).

Oops!  You have found a bug in DDD.

If you can reproduce this bug, please send a bug report
to <[email protected]>, giving a subject like

    DDD 3.3.12 (i386-apple-darwin14.4.0) gets Xt error

To enable us to fix the bug, you should include the following information:
* What you were doing to get this message.  Report all the facts.
* The contents of the `~/.ddd/log' file as generated by this session.
Please read also the section "Reporting Bugs" in the DDD manual.

We thank you for your support.

ddd: Cannot save options


Log file:

GNU DDD 3.3.12 (i386-apple-darwin14.4.0)
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 6.1.0 (clang-602.0.53)
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 2016-05-26 by (unknown).
$  ddd
!  Xt error: Unresolved inheritance operation
!  Xt error
!  Cannot save options
~                          


Installed through ports (no broken files) on 

  Mac OS X 10.10.4
  Model Name:	iMac
  Model Identifier:	iMac14,2
  Processor Name:	Intel Core i5
  Processor Speed:	3,4 GHz
  Number of Processors:	1
  Total Number of Cores:	4
  L2 Cache (per Core):	256 KB
  L3 Cache:	6 MB
  Memory:	16 GB