Exception ignored in: XXX , I want to know what happened here.

[杨明聪]

Good night everyone,

I'm a new to Gurobi,

I got four different outputs when I ran my model, shown as follow:

(1)  Exception ignored in:  XXX

(2)  240532 94291 infeasible   68        94.00000   68.00000  27.7%  46.3 2509s 

(3)  249987 98526     cutoff   43        94.00000   68.00000  27.7%  46.3 2619s

(4)  251481 99235   79.00000   60   12   94.00000   68.00000  27.7%  46.4 2637s

I want to know what's different with each information , and the (1) , (2) information show that my model is wrong ?

Sorry for my poor English , and look forward to your help.

Thank you!

                                                            - MingCong Yang

[Daniel Espinoza]

Dear MingCong Yang

about (1), AFAIK ,I don't recognize it as a gurobi output;

the other lines are describing how the algorithm is progressing within B&B,

you can take a look at 

http://www.gurobi.com/documentation/7.0/refman/mip_logging.html

for details.

If you are suspecting some strange behavior, please send the MPS file so we can take a look.

Best

Daniel

[杨明聪]

Dear Daniel

  Thank you very much for your reply . 、

  In http://www.gurobi.com/documentation/7.0/refman/mip_logging.html, I got that 3 ,4 are normal outputs, but there is no description of 2.

  As the information you have replied to me, if I can think that 2 is also normal output and does not means that my model is wrong ？

  Thanks again for your reply.

                                                                                              -MingCong Yang

在 2016年12月2日星期五 UTC+8上午1:03:43，Daniel Espinoza写道：

[Daniel Espinoza]

Dear MingCong Yang

(2) is just saying that the current node being explored (one within the 94291 nodes still open) within the B&B tree is infeasible

Best

Daniel

[杨明聪]

Dear Daniel

  Thank you very much for your reply！

Yours

MingCong Yang

在 2016年12月2日星期五 UTC+8下午6:27:52，Daniel Espinoza写道：