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<div class="moz-cite-prefix">I do not have ampl, but if someone can
convert the .mod file to a .nl file, then I can look at it. It
might be an error in reading .nl files.<br>
<br>
John Forrest<br>
<br>
On 07/07/14 13:54, Tú San Phạm wrote:<br>
</div>
<blockquote
cite="mid:CAAfQOS+oCvBPW5U9ONr9aFCWqBXCocRxu3xO6WFxnE1PvaZAGQ@mail.gmail.com"
type="cite">
<div dir="ltr"><span
style="font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px">Dear
all,</span>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px"><br>
</div>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px">I
submitted the same model to NEOS using Gurobi and CBC. Gurobi
gave me the optimal solution with objective value equals to 24
(this is the optimal solution, I have checked with CPLEX),
while CBC gave me the one with objective value equals to 4
(for the same instance: 6*6 matrix)</div>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px"><br>
</div>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px">Attached
is the model that I used. Could you please give me any idea
why it goes wrong?</div>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px"><br>
</div>
<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px">Thanks
a lot</div>
<span
style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Arial,Helvetica,sans-serif;font-size:13.333333015441895px"><font
style="margin:0px;padding:0px;border:0px;vertical-align:baseline"
color="#888888">
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<br>
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<div
style="margin:0px;padding:0px;border:0px;vertical-align:baseline">San</div>
</font></span></div>
<br>
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<pre wrap="">_______________________________________________
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</pre>
</blockquote>
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