ProCKSI

/usr/lib64/graphviz/config was missing. Copied it over from development machine:

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libgvplugin_dot_layout.so.2 dot_layout {
   layout {
      dot 0
   }
}
libgvplugin_neato_layout.so.2 neato_layout {
   layout {
      neato 0
      fdp 0
      twopi 0
      circo 0
      nop 0
      nop1 0
      nop2 0
   }
}
libgvplugin_usershape_gd.so.2 usershape_gd {
   usershape {
      png-gd 0
   }
}