Deployed Application not able to install using web installer in CentOS6

I am using MATLAB 2019b. OS is CentOS6 (RHEL6)

I followed these steps:

1) Wrote a MATLAB code "SampleApp.m"

2) Using deploytool, build it as a "stand alone application". "Runtime download from web" options was selected.

3) In "for redistribution" folder, SampleAppInstaller_web.install file was generated.

In terminal, I tried to install it using command and got the following error

$ sudo ./SampleAppInstaller_web.install

Error: Download process failed - Couldn't connect to server

. Check your internet connectivity, proxy server, firewall, and virus scanner settings and rerun the installer.

Installation failed.

I have checked the internet settings, set the proxy and disabled firewall. The "yum update" command is also working fine.

What could be the reason for the error ? Is there any limitation of support for CentOS 6 ?

Answer 1

[Etsuo Maeda]

I am not sure your network environment but you can download MATLAB Runtime from your web browser: https://mathworks.com/products/compiler/matlab-runtime.html

If you changed the proxy server in your MATALB configulation window, please try to deploy your application again because the deployed application inherits almost all of environmental settings of your latest development environment.

note: R2019b requires Red Hat 6.7 and later

HTH

[Varun Pai]

Thank you Maeda-san for the answer.

Actually I want to ship the installer and keep the deployed file size minimum without packaging the runtime together. So that is the reason why I have chosen "Runtime download from web".

As you told, I have checked my OS version and it is CentOS 6.10(final). Also I changed the MATLAB web proxy at Home > Preferences > MATLAB > Web

I deployed the application again and got the same error. Two different errors are found when when the installer is run with and without superuser previleges. I am attaching the image

[Etsuo Maeda]

Dear Varun Pai,

Thank you for updates.

In my understanding sudo ./AppInstaller_web.install is the best way to install your application.

Could you please try the following commands to confirm your Proxy settings???

url = https://mathworks.com/products/compiler/matlab-runtime.html;
data1 = webread(url);
data2 = urlread(url);

It seems that your MATLAB failes to connect mathworks.com through HTTPS port 443.

HTH

[Varun Pai]

Maeda-san, You are right. It is unable to connect.

Is the certificate issue related to proxy ?

[Etsuo Maeda]

Varun - san,

Thank you very much for updates.

I believe following commands will help you to enable MATLAB to access https port:

java.lang.System.setProperty('https.proxyHost', java.lang.System.getProperty('tmw.proxyHost'))
java.lang.System.setProperty('https.proxyPort', java.lang.System.getProperty('tmw.proxyPort'))

After execution of those commands, please try following commads again:

url = https://mathworks.com/products/compiler/matlab-runtime.html;
data1 = webread(url);
data2 = urlread(url);

The result of webread or urlread will be improved. Then, please try to deploy and install your App again.

deploytool % or mcc -m xxx.m command
! sudo ./AppInstaller_web.install % system command

HTH

[Varun Pai]

Maeda-san,

Thank you for the updates.

I tried the above method of setting java system property. But the function webread() returned the same error.

Then I added a symbolic link to the ca-certificates.crt file using following command

!sudo ln -s /etc/ssl/certs/ca-bundle.trust.crt /etc/ssl/certs/ca-certificates.crt

After this, the "certificate error" from webread(url) was gone. So I thought I got access to MATLAB runtime URL.

So I deployed my application again and run it using sudo.

But still it is showing that it is unable to connect to the server. I tried restarting the OS and reconnecting the network, but still it doesn't work.

[Etsuo Maeda]

Hi Varun - san,

Your proxy issue seems very complicated, I will need more time for investigation... sorry.

Here is another solution. Following system commands are expected to download and install R2019b Update1 MCR, MATLAB Runtime in your Linux system.

$ wget http://ssd.mathworks.com/supportfiles/downloads/R2019b/Release/1/deployment_files/installer/complete/glnxa64/MATLAB_Runtime_R2019b_Update_1_glnxa64.zip
$ unzip MATLAB_Runtime_R2019b_Update_1_glnxa64.zip
$ sudo ./install

After installation of MCR, you can redistribute files in "for_redistribution files only" folder. This folder includes executable files only which can work in MCR installed environment.

Best

[Varun Pai]

Maeda-san,

Thank you for the instructions. I was finally able to solve it.

I followed the below 2 steps:

1) Added these lines in the file /etc/environment of CentOS

http_proxy=http://<proxy_address>:<portnumber>/
https_proxy=http://<proxy_address>:<portnumber>/

2) Created a symbolic link to the ca-certificates.crt file

!sudo ln -s /etc/ssl/certs/ca-bundle.trust.crt /etc/ssl/certs/ca-certificates.crt

Then run

!sudo ./AppInstaller_web.install