Why do I encounter a "Received fatal alert: protocol_version" when installing a Support Package in MATLAB R2017a or earlier?

When installing a Support Package in MATLAB R2017a or earlier, I keep getting this message (Fatal Alert: Protocol_version). The installer says that "MATLAB is in the middle of a downloading operation".

Answer 1

[MathWorks Support Team]

If you are seeing this error message when installing a Support Package into a release of MATLAB that is R2017a or older, then you will need to follow the directions from the Bug Report link below to resolve the error.

Bug Reports

https://www.mathworks.com/support/bugreports/1741173

[Walter Roberson]

Access to that attachment requires setting a cookie. You might have your browser set to reject that cookie. For example it works for me from Safari but not from Netscape, but if go into netscape preferences to Privacy and Security, and change Tracking Protection from "Always" to "Never" then I can access the attachment.

[Walter Roberson]

If you have privacy add-ons such as Privacy Badger then you might need to disable them.

[Walter Roberson]

My experimentation a moment ago with Firefox showed that clicking to download the attachment failed to bring up the appropriate page whenever I have Firefox configured to tell websites "Do Not Track". Turning that off allowed me to start the agreement and do the downloads.

[Walter Roberson]

In each case, the repair is to go into the bin directory of your MATLAB installation, and go into the architecture-specific directory there such as win64 for windows, and to change or add a java.opts file with content

-Dhttps.protocols=TLSv1,TLSv1.1,TLSv1.2