Iteration info is not displaying in Matlab

[asiny...@nes.ru]

Hi all,

I'm using knitro with matlab. Iteration information is not showing up during solution process, only after computation is over. I'm using these options: options=knitro_options('algorithm',1,'outlev',4,'ftol',1e-10,'maxit',3,'maxfevals',30,'hessopt',3,'outmode',0); Any ideas how to fix it? Thanks

[Richard Waltz]

Hi,

Putting an empty display command:

  disp '';

in your objective function callback routine passed to Knitro should fix this issue.  See, for instance, the beginning of the "objfun" function in "exampleNLP1.m"  provided in the Knitro 12.1 distribution under "knitromatlab/examples".

Regards,

-Richard

Richard WALTZ

Senior Scientist

 

Artelys USA

 

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From: kni...@googlegroups.com [kni...@googlegroups.com] on behalf of asiny...@nes.ru [asiny...@nes.ru]
Sent: Monday, April 20, 2020 1:57 AM
To: Artelys Knitro forum
Subject: [Knitro] Iteration info is not displaying in Matlab

Hi all,

I'm using knitro with matlab. Iteration information is not showing up during solution process, only after computation is over. I'm using these options: options=knitro_options('algorithm',1,'outlev',4,'ftol',1e-10,'maxit',3,'maxfevals',30,'hessopt',3,'outmode',0); Any ideas how to fix it? Thanks

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[Alexey Sinyashin]

Great, thanks!

[李佳旭]

Thanks for your advice.

I notice that the " disp ''; " has been put in  the Knitro 12.3 distribution under "knitromatlab/examples" but the iteration information is still not showing up before the computation is over.

Do you have any ideas how to fix it? 

Thanks

[richard.waltz]

We have not been able to reproduce the issue you report.  We tested using Knitro 12.3 on the latest MATLAB R2021a and using the disp''; command seems to flush the iteration output to the screen every iteration as expected.  If you can tell us what operating system you are using, what version of MATLAB you are using, and provide us an example to reproduce the issue, we will investigate further.

[Jiaxu Li]

Thanks a lot.

The problem is solved by updating the Matlab version and simplifying the model.

^_^