That was the analyst making a mistake, not a bug in the software. They used poorly shaped or too few elements which lead to an underestimate of the stress. This has always been a well known limitation of the finite element method and any competent user will know about it and the techniques to protect against it.<p>Here&#x27;s a slightly more detailed article<p><a href="http:&#x2F;&#x2F;journals.library.mun.ca&#x2F;ojs&#x2F;index.php&#x2F;prototype&#x2F;article&#x2F;download&#x2F;422&#x2F;567" rel="nofollow">http:&#x2F;&#x2F;journals.library.mun.ca&#x2F;ojs&#x2F;index.php&#x2F;prototype&#x2F;artic...</a>