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

[Roger Ghanem]

running on:
Darwin Air 14.5.0 Darwin Kernel Version 14.5.0: Mon Aug 29 21:14:16 PDT 
2016; root:xnu-2782.50.6~1/RELEASE_X86_64 x86_64

--------------begin error message----------
Warning: No type converter registered for 'String' to 'Orientation' 
conversion.
Warning: No type converter registered for 'String' to 'Orientation' 
conversion.
Warning: No type converter registered for 'String' to 'Orientation' 
conversion.
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 <address@hidden>, giving a subject like

    DDD 3.3.12 (i386-apple-darwin14.5.0) 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
--------------end error message----------


--
Roger Ghanem
210 KAP Hall
University of Southern California
Los Angeles, CA 90089
Tel: 213 740 9528