Installation fails - Error: Unable to connect to host sun.security...

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Georg Stoellinger 2019-9-30

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评论： Martin Nørgaard 2020-3-4

Dear Mathworks support team,

whenever I try to install Mathlab R2019b the installation fails when using "Log in with a MathWorks account".

The error given says "Error: Unable to connect to host.sun.securityValidatorException: PKIX path building failed..."

Is there any way how to solve this issue?

Best regards,

George

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Paul De Meulenaere 2020-2-18

Same problem here ... I'm working on a brand new laptop (Win 10) as well. Installing Matlab gives exactly the same problem as above. I did it for R2019b, but I also tried for R2019a with the same negative result.

I re-installed java (Java 8 update 241) as suggested below, deleted the temp folder, I rebooted the PC, etc. but this didn't bring any solution ...

Martin Nørgaard 2020-3-4

I tried Paul De Meulenaeres exact actions on a Windows Server 2019 and it worked.

Tried installing R2019b, ("PKIX path building failed ...")
Deleted temp folder created by the installer.
Installed Java 8 U 241
Rebooted
Ran R2019b installer again
No issues, where the error showed before.

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回答（2 个）

rai7aeLa 2019-10-2

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Solved it. Install Java manually from java.com. The JRE included in the Matlab Installer seems to be broken.

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rai7aeLa 2019-10-10

Does your Windows have all updates installed (including optional ones)? Have you rebooted after installing Java manually? Also you could try to delete the temporary folder created by the Matlab installer and run it again. I did not need to to anything other than these things. I thought it was Java that solved the issue because it worked after I did that.

Marty556 2019-11-24

Thank you, rai7aeLa, your solution (also) worked for me. I first deleted the _temp folder already created by the Matlab installer, then installed Java jre1.8.0_231 and rebooted the machine. Afterwards, the Matlab installation succeeded.

In contrast, the often suggested standard fix of deactivating Antivirus protection and/or changing Firewall settings had done nothing at all.

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