Hi,<div><br></div><div>I get the following error for Graphene Ribbon with porosity, can anyone help.</div><div><br></div><div><div> from  cdiaghg  : error #       426</div><div>      problems computing cholesky</div><div><br>
</div><br>-- <br>Regards,<br>Swapnil Chandratre<br>Graduate Student<br>Dept. of Mechanical Engineering,<br>University of Houston,<br>Houston, TX<br>(M)-713-294-9546<br>
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