Mesh Triangle RunFEKO Error with RL-GO

I'm trying to simulate an electrically large structure (a plane) with geometry imported from SolidWorks using RL-GO running on FEKO v14.0.430. I have run the simulation for three different GO ray increment settings and for each trial, RunFEKO has returned the same error, although at different levels of simulation completion: 

ERROR 47000: Triangle #13 is incorrect on curvilinear mesh for RL-GO. A finer mesh that more accurately represents the geometry could resolve the problem.

See also message in the output file Boeing737_400_0.7incsbasic.out

 

How can this error be eliminated and what caused it? I wasn't aware GO mesh density could be controlled (and I have to use GO for this simulation). I'm always worried CAD imports will cause issues but haven't experienced many problems with other imports so far and haven't encountered this error before either.

 

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