numerical issues

[YQ WANG]

Dear Professor Bierlaire,

I hope you are doing well.

While running my model, I encountered some numerical issues, as shown in the attached screenshot. I am writing to ask what might be the cause of these warnings, and whether they could affect the validity or reliability of the final estimation results.

Your insights on this matter would be greatly appreciated.

Thank you very much for your time and guidance.

  Best regards,
  WANG YQ

[Michel Bierlaire]

If those are only warnings you can ignore them. But make sure to verify that the final solution makes sense.

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Michel Bierlaire
Transport and Mobility Laboratory
School of Architecture, Civil and Environmental Engineering
EPFL - Ecole Polytechnique Fédérale de Lausanne
http://transp-or.epfl.ch
http://people.epfl.ch/michel.bierlaire