When running the boards manager it "errors" see attached
with this also
Error downloading http://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$0(ContributionManagerUI.java:151)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: Error downloading http://downloads.arduino.cc/packages/package_index.json
at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:131)
at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:334)
at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:309)
at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:287)
at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$0(ContributionManagerUI.java:147)
... 1 more
Caused by: java.io.IOException: Received invalid http status code from server: 416
at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:194)
at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:128)
at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:129)
... 5 more
To download this file, the boards manager tries to access the internet. If you have any proxies between your computer and the internet, they may prevent complete communication. For example, at my work we have a proxy and I needed to download some boards and I have the same error.
If you can, try to find a computer that can access the internet normally without any hinderances and download the IDE. Then try to download the board files onto that computer. After that, you can find the directory location of those files on the second computer, transfer them to a flash drive, and then transfer from the flash drive to the same directory on the first computer that cannot access the internet completely. Do this while the IDE is closed, and when you reopen the IDE the board option should be present when you go to Tools->Board.
Let me know if your computer has a proxy in it and what board file you are trying to get, then I can give you more detailed instructions on how to get the files transferred.
I can't understand what you're saying. Take some time to thoroughly explain yourself. I guess English is not your native language but that just means you need to make an extra effort. You're welcome to use Google Translate. If you use lots of words then, even if not everything you say translates correctly, chances are there will be enough context for us to get your meaning. When you only use a couple of words it's very likely your meaning will not get across.
I ran that version and then invoked the boards manger in the Arduino IDE Tools->Board->Board Manager.
The boards manager update process ran OK and did not report any java errors or (red) error message.
I then proceeded to re-run IDE version 1.8.6 and and then invoked the boards manger in the Arduino IDE Tools->Board->Board Manager.
The boards manager update process ran OK and did not report any java errors or (red) error message.
I'm confused then why you opened the issue report since that indicates the problem has already been fixed. However, I'm glad to hear that you're now able to use Boards Manager. Enjoy!
