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

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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".

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 6 Nov 2019
This error does not occur when installing Support Packages in MATLAB R2017b.
This issue is now resolved in the following error bug report page:
Please contact MathWorks Technical Support and create a help ticket if you run into any other related issues

  15 Comments

Eduardo Quintanar
Eduardo Quintanar on 25 Sep 2020
The .zip file you download in that link has a java.opts file (among other 2).I extracted java.opts onto my MATLAB folder and it did not work, but I moved it to /bin/win64 folder and it worked. I use MATLAB R2016a.

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More Answers (8)


Sharad Gholap
Sharad Gholap on 7 Apr 2018
When installing a Support Package in MATLAB R2016a or earlier, I keep getting this message (Fatal Alert : Protocol_version). The installer says that "MATLAB is in the middle of a downloading operation".

Tech Support
Tech Support on 13 Apr 2018
Hi,
If you are still having trouble installing the support package, please contact MathWorks support:
-Justin
MathWorks Installation & Licensing Support

  0 Comments

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Efrain Teran
Efrain Teran on 1 Nov 2018
The solution worked well in my 2015a version. Please be aware that, in summary, you just need to add one file to the bin>win64 folder (in the windows version) and a couple to the bugreport folder.

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Bhuvana Krishnaraj
Bhuvana Krishnaraj on 4 Jun 2019
When installing a Support Package in MATLAB R2015a, I keep getting this message (Fatal Alert : Protocol_version). I tried that java.opts but also i am getting the same error how clear it ,please help any one to me.....

  1 Comment

Colin Fraser
Colin Fraser on 5 Jun 2019
Make sure you place the java.opts file in the following directory:
C:\Program Files\MATLAB\R2015a\bin\win64
If you are still having trouble installing the support package, please contact MathWorks support:
-Colin
MathWorks Installation & Licensing Support

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