[AMPL 15279] CPLEX 12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

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[AMPL 15279] CPLEX 12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

alexandrepsv10
THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS


I am a beginner in AMPL and resolving the template appears this message. 

model D:\tp.mod;
CPLEX 12.7.1.0: integer infeasible.
0 MIP simplex iterations
0 branch-and-bound nodes
No basis.

what could be the mistake?

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RE: [AMPL 15283] CPLEX 12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

Robert Fourer-2
CPLEX has found that your problem is "integer infeasible" which means that there is no way to satisfy all of the constraints and to also have integer values for all of the "integer" and "binary" variables.  To fix this problem, you will need to study your model and data to figure out why no integer-feasible solution is possible, and then you will need to use your knowledge of the model to determine what correction is needed.

To help you find the cause of the infeasibility, you can ask CPLEX for an "irreducible infeasible subset" of constraints by following the directions in this response to a similar question:

https://groups.google.com/d/msg/ampl/o8aNfwpoBAc/D46d6cfICQAJ 

Bob Fourer
[hidden email]

=======

From: [hidden email] [mailto:[hidden email]] On Behalf Of Alexandre Vaz
Sent: Sunday, December 3, 2017 10:29 AM
To: AMPL Modeling Language
Subject: [AMPL 15279] CPLEX 12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

I am a beginner in AMPL and resolving the template appears this message.

model D:\tp.mod;
CPLEX 12.7.1.0: integer infeasible.
0 MIP simplex iterations
0 branch-and-bound nodes
No basis.

what could be the mistake?


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Re: [AMPL 15295] CPLEX 12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

alexandrepsv10
I'm going to review the model to find the problem, thank you, sir.

Em domingo, 3 de dezembro de 2017 16:58:03 UTC-2, Robert Fourer escreveu:
CPLEX has found that your problem is "integer infeasible" which means that there is no way to satisfy all of the constraints and to also have integer values for all of the "integer" and "binary" variables.  To fix this problem, you will need to study your model and data to figure out why no integer-feasible solution is possible, and then you will need to use your knowledge of the model to determine what correction is needed.

To help you find the cause of the infeasibility, you can ask CPLEX for an "irreducible infeasible subset" of constraints by following the directions in this response to a similar question:

<a href="https://groups.google.com/d/msg/ampl/o8aNfwpoBAc/D46d6cfICQAJ" target="_blank" rel="nofollow" onmousedown="this.href=&#39;https://groups.google.com/d/msg/ampl/o8aNfwpoBAc/D46d6cfICQAJ&#39;;return true;" onclick="this.href=&#39;https://groups.google.com/d/msg/ampl/o8aNfwpoBAc/D46d6cfICQAJ&#39;;return true;">https://groups.google.com/d/msg/ampl/o8aNfwpoBAc/D46d6cfICQAJ

Bob Fourer
<a href="javascript:" target="_blank" gdf-obfuscated-mailto="enh43Q3-AgAJ" rel="nofollow" onmousedown="this.href=&#39;javascript:&#39;;return true;" onclick="this.href=&#39;javascript:&#39;;return true;">am...@...

=======

From: <a href="javascript:" target="_blank" gdf-obfuscated-mailto="enh43Q3-AgAJ" rel="nofollow" onmousedown="this.href=&#39;javascript:&#39;;return true;" onclick="this.href=&#39;javascript:&#39;;return true;">am...@... [mailto:<a href="javascript:" target="_blank" gdf-obfuscated-mailto="enh43Q3-AgAJ" rel="nofollow" onmousedown="this.href=&#39;javascript:&#39;;return true;" onclick="this.href=&#39;javascript:&#39;;return true;">am...@...] On Behalf Of Alexandre Vaz
Sent: Sunday, December 3, 2017 10:29 AM
To: AMPL Modeling Language
Subject: [AMPL 15279] CPLEX <a href="http://12.7.1.0" target="_blank" rel="nofollow" onmousedown="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F12.7.1.0\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHcLASYOqdtNJ151qS-adAU7qVhxw&#39;;return true;" onclick="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F12.7.1.0\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHcLASYOqdtNJ151qS-adAU7qVhxw&#39;;return true;">12.7.1.0: integer infeasible THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

THE VEHICLE ROUTING PROBLEM WITH TIME WINDOWS

I am a beginner in AMPL and resolving the template appears this message.

model D:\tp.mod;
CPLEX <a href="http://12.7.1.0" target="_blank" rel="nofollow" onmousedown="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F12.7.1.0\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHcLASYOqdtNJ151qS-adAU7qVhxw&#39;;return true;" onclick="this.href=&#39;http://www.google.com/url?q\x3dhttp%3A%2F%2F12.7.1.0\x26sa\x3dD\x26sntz\x3d1\x26usg\x3dAFQjCNHcLASYOqdtNJ151qS-adAU7qVhxw&#39;;return true;">12.7.1.0: integer infeasible.
0 MIP simplex iterations
0 branch-and-bound nodes
No basis.

what could be the mistake?


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