Division by zero.

[lvl107]

  Hello, Everyone.

  May someone tell me the reason of "Division by zero" ?

  Thanks in advance for your time and help.

      Regards.

           Loi.

[lturek · Accepted solution]

Its the vectorization of the inverse of a matrix containing a zero

[lvl107]

Thank you, Leopold. I got it. .

      Regards.