Error using urlwriteread. Error downloading URL.

Hello,

I'm studying machine learning from coursera.org. I'm using Matlab R2015b academic license. I've got error message during the job submission.

!! Submission failed: unexpected error: Error using urlreadwrite (line 98) Error downloading URL. Your network connection may be down or your proxy settings improperly configured. !! Please try again later.

I tried to set off windows firewall & antivirus and also reinstall Windows. The problem is still the same. What should I do to solve it.

Thank for advance.

[Walter Roberson]

What "job" is being submitted?

[Ilya Bryukhanov]

They provided a list of .m files for solve some problems which I need to submit by calling submit() function. After I need to input my login e-mail and specific token provided on coursera.org site. Then ideally their system should test my code. But I've got this error. Moreover I tried to find the correct URL that I connected by writing urlConnection before try block in urlreadwrite function. I get this.

Java exception occurred: java.io.IOException: Server returned HTTP response code: 500 for URL: https://www-origin.coursera.org/api/onDemandProgrammingImmediateFormSubmissions.v1

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown

This error occured even after I add certificate SSL for www-origin.coursera.org website.

[daniel sand]

I have the same problem, did you manage to solve it?

[Roshan George]

did anyone solve this problem?

[sissy magen]

I also have the same problem, and it seem like there is nobody who can tell how to solve it. Hope Matlab will investigate it, and support us with solution.

[Issa Asrawi]

To solve this problem, you should first clear the workspace and then close the octave files that you're opening. I encountered the same error and when I did these steps I submitted my work correctly.

[Iftimie Florentin Alexandru]

If anybody still encounters this issue, try to use Octave (latest version on 23.10.2018). It solved my problem ( Error using urlreadwrite (line 56))

[SHASHANK PANDEY]

try to use octave (latest) version, you will be able to submit it.

[Suraj Badam]

my problem also same as you,but

!! Submission failed: unexpected error: Error using urlreadwrite_legacy (line 96)Error downloading URL. Your network connection may be down or your proxy settings improperly configured.is there any solution

REPLY

[selyan Leandro]

I have the exact same problem with an error on line 96 on the urlreadwrite_legacy, does anyone know how to fix it

[Akshat Sharma]

@Suraj Badam@selyan Leandro if you have not figured out, then try new zip file. It's named "ex1-ex8-matlab" now. You can get that in 2nd week course. this worked for me

[Muskan Bagrecha]

Thanks @Akshat Sharma, it fixed my issue.

[zhida zhang]

Dear @Akshat Sharma, thank you very much, it solves my problem. Was confused for two weeks!

[Guillermo Rosich]

I tried ex1-ex8-matlab.zip and it worked for me! Thanx a lot @Akshat Sharma

Answer 1

[Tushar Sinha]

Hi llya,

The problem here is that although your browsers trust certificates signed by "Trustwave", MATLAB release R2013a does not (yet). You can manually add Trustwave or the specific certificate of the website which you are working with to MATLAB's trusted certificate store however. The following article on our website explains how you can do this:

http://www.mathworks.com/matlabcentral/answers/92506

I hope this helps answer your question.

Thanks,

Tushar

[Walter Roberson]

Interesting -- but the user indicated R2015b, not R2013a.

[Ilya Bryukhanov]

I download certificate for www-origin.coursera.org using Mozilla and then add it to MATLAB acerts file by Portede software. But nothing changes.

Moreover I tried to find the correct URL that I connected by writing urlConnection before try block in urlreadwrite function. I get this.

Java exception occurred: java.io.IOException: Server returned HTTP response code: 500 for URL: https://www-origin.coursera.org/api/onDemandProgrammingImmediateFormSubmissions.v1

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown