[Slackbuilds-users] FreeCAD compiles, but crashes and burns on takeoff

[Jim Diamond]

Hi,

I just used sboinstall to install FreeCad (and, as far as I can tell
from reading the READMEs, all the required and optional dependencies).

When I go to start FreeCAD, I get

FreeCAD 0.13, Libs: 0.13R$WCREV$
© Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2011
  #####                 ####  ###   ####  
  #                    #      # #   #   # 
  #     ##  #### ####  #     #   #  #   # 
  ####  # # #  # #  #  #     #####  #   # 
  #     #   #### ####  #    #     # #   # 
  #     #   #    #     #    #     # #   #  ##  ##  ##
  #     #   #### ####   ### #     # ####   ##  ##  ##

During initialization the error the sip module implements API v7.0 to v7.1 but the PyQt4.QtCore module requires API v9.1 occurred in /opt/FreeCAD/Mod/Ship/InitGui.py
During initialization the error the sip module implements API v7.0 to v7.1 but the PyQt4.QtGui module requires API v9.1 occurred in /opt/FreeCAD/Mod/Plot/InitGui.py
zsh: segmentation fault (core dumped)  FreeCAD


I'm at a loss as to how to proceed.  Can anyone set me on the right path?

(I'm on Slackware 64 14.1 + multilib, and I'm hoping no-one will tell
me that multilib is the problem.)

                                Jim