MATLAB Answers

Why do I get a connection error when installing or activating MATLAB or another MathWorks product?

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MathWorks Support Team
MathWorks Support Team on 3 Jan 2013
Commented: Ying on 20 Nov 2020 at 14:46
I get an error that I cannot connect to MathWorks when running the MathWorks installer or the activation client; however, I can access the website. Why can't the MathWorks Installer or activation client connect to the MathWorks?
Connection Error
The application could not connect to MathWorks.
For more information on resolving this issue, see this Support Article.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 1 Apr 2020
Edited: MathWorks Support Team on 25 Sep 2020
Computer Security software is preventing the MathWorks Installer from connecting to the MathWorks servers. This is known as a connection issue due one or more of the following:
  • Antivirus Software
  • Proxy
  • Firewall
Antivirus Software
To temporarily disable your Antivirus on Windows:
  1. Locate the Antivirus protection program icon on the Windows system tray.
  2. Right-click the icon and select Disable, Stop, etc. to temporarily disable the program. In some cases, you may need to open the program and disable it using the program's menus.
To temporarily disable your Antivirus on a Mac:
  1. Locate the Antivirus icon found on your Mac menu bar.
  2. Click Shut down or disable temporarily until installation and activation have completed.
To temporarily disable your Antivirus on a Linux:
  1. Locate the Antivirus protection program icon on the Linux system tray.
  2. Click Shut down or disable temporarily until installation and activation have completed.
Proxy
The MATLAB installer, activation client and update installer will try to automatically inherit your computer's proxy settings on Windows. If this process fails, you may need to manually enter your settings using the "connection settings" button on the first screen of the installer or activation client. The update installer will not allow you to enter your proxy credentials as it automatically inherits your computer's proxy settings. On Mac and Linux, you will always need to enter these settings manually.
To disable your Proxy in Internet Explorer:
  1. Click the Tools button and then select Internet Options.
  2. Click the Connections tab and then select LAN settings.
  3. Uncheck the check box for Use a proxy server for your LAN.
To disable your Proxy in Chrome:
  1. Open the Customize and Control Google Chrome menu by clicking on the three-dots icon at the top right of Google Chrome, select Settings on the right, find Advanced and finally select o*pen proxy settings.*
  2. Select the LAN Settings button.
  3. Deselect the checkbox for Use a proxy server for your LAN.
To disable your Proxy in Safari:
  1. Go to Menu and click on Preferences from the drop-down menu.
  2. Select the Advanced tab and then click on the Change Settings button.
  3. Deselect the checkbox for Use a proxy server for your LAN.
To disable your Proxy in Firefox:
  1. Click the Tools button and select Options.
  2. Go to the Advanced panel and select the Network tab.
  3. Click on Settings in the Connection Section and select No Proxy.
You will need to contact your IT Help Desk to troubleshoot this issue if you don't know your proxy settings or the error persists after entering your proxy settings.
Firewall
You will need to contact your IT Help Desk if your organization is running a network firewall to configure it to bypass blocked connections to the MathWorks servers.
The MathWorks installer needs to contact MathWorks servers on the following ports and addresses:
  • login.mathworks.com
  • services.mathworks.com
  • TCP ports 80 and 443
Your firewall needs to bypass blocked connections for both addresses over both ports. These servers do not use a Static IP Address and will resolve to a Dynamic IP Address. This means that users will not be able to white-list MathWorks servers via IP Address and will have to use the domain name.
If the MathWorks installer is still unable to connect after troubleshooting your proxy and firewall, submit a service request using the link below. Please include the troubleshooting steps you took to resolve the connection issue, and include your installation log file. See this related article if you need assistance locating your log file:

  32 Comments

MARIO CHANG
MARIO CHANG on 14 May 2020
None of the ‘fixes’ mentioned above fixed the error on Catalina OSX. The Proxy setting checkbox doesn’t even exist.
Was able to install R2020a with this procedure:
1. Download installation folder using another computer 2. Copy folder to desired computer 3. Edit ‘installer_input.txt’ per instructions in ‘installer_input.txt’ 4. From terminal, run the ‘install’ unix executable. Note that install is also a built-in OSX command, so must invoke the unix executable using full path.
For example: /Users/username/Downloads/Matlab/R2020a/install -inputFile editedfile.txt
Andrea Silvestro
Andrea Silvestro on 18 May 2020
MARIO CHANG could you help me? I do not understand your explanation. What is the installation folder? I do not have access to another Mac.

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More Answers (67)

Sean
Sean on 30 Jul 2014
When I received this error, it was not due to proxy settings or firewall settings. Rather, when I downloaded the installer, the download location was on a remote drive (a windows remote profile DFS location). I copied the setup file to the local drive, and it ran fine.

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Walter Roberson
Walter Roberson on 24 Jan 2020
Which drive are you asking about, Rojitha Goonesekere ?
Try looking in ~/Downloads/MathWorks/R2019b/ perhaps? That is where the installer tosses the installation program and archives .
Tong Li
Tong Li on 16 Apr 2020
It is so useful!!! I change the download files location from 'download' to 'program files/matlab' and it installed successful!!!

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khalid Houhou
khalid Houhou on 28 Feb 2018
I had this issue and it was not related to any network or connection. It was caused by a Malware I had in my PC called relevantknowledge. I uninstall it and it worked.

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Brian Zarling
Brian Zarling on 16 Feb 2015
I turned off my firewall and I still can't connect to Mathworks.

  6 Comments

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Daniel Torres
Daniel Torres on 26 Aug 2020
I was getting installation errors left and right. I did an internet speed test and saw I was pulling only 10MB. I relocated my wireless dongle, retested, 150MB. Tried again - installed successfully.
Seems the installer is persnickity with your download speeds.

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Brett Hansell
Brett Hansell on 8 Oct 2019
  1. Under System Variables, select New.
  2. Set the first variable name "JAVA_TOOL_OPTIONS" with the value of "-Djava.net.preferIPv4Stack=true" (enter these without the quotation marks)
  3. select New again.
  4. Set the second variable name "JAVA_OPTIONS" with the value of "-Djava.net.preferIPv4Stack=true" (enter these without the quotation marks) and click on OK
  5. Click OK again on the previous screen and try the installer again.

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Chris Håkansson
Chris Håkansson on 23 Feb 2015
I had the same problem and followed all instructions above about filling in proxy-server information and deactivating the firewall etc. but nothing worked. Turned out all I needed to do was uncheck the box which indicates to use a proxy server. It is as mentioned in other links found in Control Panel/Internet Options/Connections/Lan Settings.

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Caitlyn Hampel
Caitlyn Hampel on 24 May 2015
I had this problem as well, but I found that it was because my internet connection was too slow. So it only worked when I used a faster connection. Beware that the downloads during installation are rather large files, including the toolbox add-ons. Hope this information can be of help to others.

  2 Comments

Mark Hulley
Mark Hulley on 9 Jun 2016
I had the same issue but it must have been my connection speed, because it worked on the third attempt without me actually changing anything.

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Gregg Casey
Gregg Casey on 29 Dec 2017
Had the same problem on my Mac and I have never had a problem like this on a Mac since I have used them. (Probably more than 8 years.) My laptop did not have the firewall turned on at all during all attempts. So this is probably just badly written software from Mathworks. What worked for me is to use my hotspot. That is all I changed - connect to my Karma hotspot and click "Next" again. Done. Note that I first did the same after connecting to my iPhone as a hotspot and that did not work. (Just clicked "next" and got the same error message.) However, that could have been that my phone was having a connection issue.
Mathworks- please look into this issue and fix it. The software should not require special proxy settings.

  3 Comments

jinxxx
jinxxx on 3 May 2018
Me too, maybe you should try it for a couple more times. I only successfully installed it after 10 times, but I made it at last.
Kyle Perry
Kyle Perry on 12 Dec 2018
Hello Ben,
If you are unable to activate successfully through your hotspot, you can try to activate MATLAB through the manual method. I have attached a link below that explins this process:

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Jon
Jon on 16 Dec 2014
On a Mac (running 10.10 [Yosemite]) I still needed to temporarily disable the Firewall (under System Preferences > Security & Privacy) in order to complete activation.

Donald Niman
Donald Niman on 23 Feb 2015
This is what I did to successfully install Matlab (Home Use) on my Windows 7 x64 SP1 system. Note that I do not know which one of the following things helped to make things work; I just did all of them. Also note that I am not using a proxy server, if you are, this will probably not help you.
1. Turned off internet router and then turned it back on.
2. Restarted the PC in Safe Mode.
3. If applicable to you: The installation file was on hard drive volume D:\ and I moved it to C:\
4. From control panel->administrative tools->Services, I right-clicked "Windows Firewall" and selected "Stop".
5. I ran the Matlab installation file from c:\.
6. When the installation screen came up, I did not click on the button at the top right of the dialog. Instead, I clicked the "next" button at the bottom. (Of course, I am not using a proxy server.)
7. A dialog appears to enter your login credentials: do that and the installation will continue.
8. The installation will eventually complete and then you can activate it by following the on-screen directions.
9. I restarted the system normally and verified that Matlab was working.
(Hopefully, I did not leave anything out.)

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Anna Smirnova
Anna Smirnova on 1 Jul 2018
Error : unable to connect to host. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Windows 7 64-bit. What am I doing wrong?

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Matthias Finsterbusch
Matthias Finsterbusch on 2 Jul 2018
I am trying to install Matlab 2018b on a Win10 64bit System, getting the following error:
"Error : unable to connect to host. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target"
Any instructions how to handle this problem? Thanks in advance.

Jan
Jan on 14 Mar 2019
Create the two environment variables
  • "JAVA_TOOL_OPTIONS" with the value "-Djava.net.preferIPv4Stack=true"
  • "JAVA_OPTIONS" with the value "-Djava.net.preferIPv4Stack=true"
Run the installer. Afterwards the variables can be removed.

  3 Comments

XiaoQian Ye
XiaoQian Ye on 29 Nov 2019
Also did the trick for me. Thanks. (After tried Firewall, antivirus, proxy all off). Mind giving a headup what the paramenters did? Thanks again!
Ani Padma
Ani Padma on 11 Jul 2020

Thanks a lot Jan, I tried all other suggested solutions with no success...I was even considering upgrading my laptop to a new one thinking it might be a hardware issue.However, this environment variables solution worked for me...Phew!!

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Charles Dalley
Charles Dalley on 5 May 2015
Right. I have restarted the process multiple times! I've checked all the suggested settings and turned off windows firewall, but every time I get to the 'select license' page having logged in, it stops me from proceeding even though it clearly is connected as it got the details in the first place!
and it blocks me from doing the license file thing, saying 'no products exist for this license' even though I activated it for 2014a
HELP, I HAVE COURSEWORK DUE

  1 Comment

Scott
Scott on 22 Jul 2015
Hi Charles,
If you are still having trouble installing MATLAB, please contact MathWorks support:
-Scott
MathWorks Installation & Licensing Support

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Furkaan Hossain
Furkaan Hossain on 25 Aug 2017
Hi there, I am using a Window's 10 on my pc. Not a part of any organizations. As far as I can tell I am not using a proxy server and I tried installing MATLAB with my firewall turned off as an administrator. I am still encountering the connection error. Any help in the matter would be greatly appreciated. Thnks

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Alexander Casalis de Pury
Is it still down? My error just reads 'The application could not connect to MathWorks' and nothing about firewalls or proxys

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Yehya Jebbaoui
Yehya Jebbaoui on 28 Sep 2017
Turn off the Wifi of the institution you are in, then turn on Mobile hotspot on your phone to share the mobile connection (if you have 3G or 4G). You will pass the first steps and it will start downloading. When it starts downloading, switch to the wifi. It worked for me.

Dewi Mar'a
Dewi Mar'a on 20 Nov 2018
I am dealing with the same problem. After almost a week I tried to install matlab more than hundred times, then I got no solution at all. My windows firewall was off, no proxy setting, no anti virus installed, even no matlab installed yet.
I am getting deperate with this problem because my deadline project comes closer, and I wasted the time too much to deal with this problem.
finally I end up with the last solution left, I tried to uninstall my windows, and try to install matlab again. BAAAAMMM....it works. do anything to get out of this stuck step. if it ends with great result, why not ? haha

  1 Comment

lin hv
lin hv on 16 Aug 2019
I feel so sorry about that. I am still through this annoying problem, yet I have to spend my time on those matter more.

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Handing Sun
Handing Sun on 23 Apr 2019
I am trying to install the 2019a on a win10 machine. I did the proxy setting, dont't have a antivirus softward, and the firwall doesn't seems to be a problem. But the connection error still exist.

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Wu Ke
Wu Ke on 9 May 2019
Why have you anything else

Luke
Luke on 26 Nov 2014
Edited: Luke on 26 Nov 2014
Internet security software designed to block certain IP ranges such as PeerBlock have MathWorks black listed in the default block-list.
Just set the blocked IP to "allow permanently" to let the installer connect and download your license details, software and associated toolboxes.

  1 Comment

Walter Roberson
Walter Roberson on 16 Jan 2017
Mathworks delivers some of its content using one of the major cloud providers. It might be the case that the cloud provider is what is blacklisted rather than Mathworks itself.

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Greg Laurie
Greg Laurie on 2 May 2015
I've also tried all of these tips, but activation via my account here doesn't work. So I tried using the File Installation Key process, but I always get the following error message: "Using a File Installation Key requires you run the installer from a MATLAB DVD or from a directory which contains files previously downloaded via the installer. To obtain the missing files, click Back on the previous screen and select Log in with a MathWorks Account or contact your MATLAB license administrator." I did get the licence code file and all. Any ideas? I need the software for a Coursera MOOC about Computational Neuroscience. Thanks in advance!

  1 Comment

Scott
Scott on 22 Jul 2015
Hi Greg,
If you are still having trouble installing MATLAB, please contact MathWorks support:
-Scott
MathWorks Installation & Licensing Support

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Bradley Alderton
Bradley Alderton on 6 May 2015
Charles, i'm in the same position as you. I have coursework due tomorrow and this is quite a headache!

  1 Comment

Scott
Scott on 22 Jul 2015
Hi Bradley,
If you are still having trouble installing MATLAB, please contact MathWorks support:
-Scott
MathWorks Installation & Licensing Support

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Carsten Jorgensen
Carsten Jorgensen on 15 Jul 2015
I just came across this same error. At first, I assumed it was because I was installing on a Windows XP system. When I discovered that Win XP was still supported for 2015a, I decided to troubleshoot further.
My resolution: The system could not communicate with the MatLab servers because the Date/Time on the system was inaccurate. - Setting the systems Date/Time correctly resolved the issue.

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Andreas
Andreas on 15 Sep 2015
The setup program was trying to go to the IP address of the mathworks site instead of DNS name. Had to add https://144.212.244.21 and https://144.212.244.16 to the firewall.
It is unclear to me why MathWorks would use fixed IP addresses instead of DNS. Please fix this issue.

  1 Comment

Scott
Scott on 4 May 2016
Andreas,
The installer does reach out to the MathWorks servers using DNS, not IP address. The IP addresses for those servers are static, yes, but that's not what the installer uses to reach them.
If the MATLAB installer is consistently resolving the wrong IP address for MathWorks service and activation servers on your machine, please contact MathWorks support so we can troubleshoot this issue.
Thanks,
-Scott
MathWorks Installation & Licensing Support

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Tony Langley
Tony Langley on 5 Dec 2015
I recently faced the same issue on my Mac. It wasn't because I was using a network proxy (per se) or that the I had OSX's firewall turned on.
Eventually I worked out that it was because of Kaspersky Internet Security. So I temporarily disabled that which then allowed the installer to work.

  3 Comments

Günther Wal
Günther Wal on 12 Jan 2016
I had the same prob on my mac. I discovered that I have to open it in the same network as I installed the software. Support didn´t provide any help. For me it´s over and out, I stick with Mathematica...
aMusings
aMusings on 30 Jan 2016
Having this issue on a Mac with El Capitan. Confirmed with Network Utility that we could reach both ports 80 and 443 at both urls listed above. Firewalls were turned off on both individual machine and router. Suggestions?

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Manoella Sánchez
Manoella Sánchez on 7 Jan 2016
I have a problem with the process. I need log in with MathWorks account. The messenge is " The application could not connect to MathWorks. For more information on resolving this issue, see this Support Article" Please help me.

Birds Mafereka
Birds Mafereka on 24 Feb 2016
The following error was detected while downloading 3p/icu_win64_1438296709.enc: null Would you like to retry downloading 3p/icu_win64_1438296709.enc? If you press No, the installer will exit without completing the installation. Hepl please I got this error and it keeps on poping when trying to download?????

  1 Comment

Scott
Scott on 4 May 2016
Hi Birds,
This type of error usually indicates that security software or antivirus software installed on your machine is interfering with the MATLAB installer. To resolve this issue, add the MATLAB installer to your security software's whitelist, or disable your security software for the duration of the installation.
Thanks,
-Scott
MathWorks Installation & Licensing Support

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Yu Xiong
Yu Xiong on 8 Mar 2016
I have got the same issue here and no idea what I should fill in on Server and Port.

Michael Rook
Michael Rook on 18 Jul 2016
I am attempting to install MatLab for the QUT Robotics course. I have downloaded the files but I cant install anything. It says it cant connect to Mathworks. In the Connection Settings box it is asking for information I dont know. It says I can leave it blank, but does not work that way either. I can't submit a Ticket as I have no License Number. I am on a home computer with a wireless modem. I have a Mathworks account. How do I install this program as nothing seems to work and I need to start this course now?

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SEI U
SEI U on 16 Jan 2017
プロキシサーバー認証の画面にユーザーとパスワードを入れて下記のエラーメッセージがありました。 「アプリケーションは MathWorks に接続できませんでした」

  1 Comment

Walter Roberson
Walter Roberson on 16 Jan 2017
Approximate translation:
I entered the user and password on the proxy server authentication screen and the following error message was found. "The application could not connect to MathWorks"

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