board manager error message

Development Tools IDE 1.x
1

When I went to board manager I received the following error:
Error downloading https://arduino.cc/packages/package_index.json

2
  • After you get that error, click the "Close" button in the Boards Manager window.
  • Click on the black console window at the bottom of the Arduino IDE window.
  • Press "Ctrl + A". This will select all the text in the console window.
  • Press "Ctrl + C". This will copy the selected text to the clipboard.
  • In a reply here, click the </> button on the forum toolbar. This will insert code tags into the reply field.
  • Press "Ctrl + V". This will paste the copied text from the clipboard between the code tags.
  • Click "Post".
3 
Error downloading https://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
	at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$1(ContributionManagerUI.java:150)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
	at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:139)
	at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:333)
	at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:307)
	at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:285)
	at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed$1(ContributionManagerUI.java:146)
	... 1 more
Caused by: java.nio.file.FileSystemException: C:\Users\cppne\AppData\Local\Arduino15\package_index.json.tmp: The process cannot access the file because it is being used by another process.

	at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
	at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
	at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
	at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
	at sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
	at java.nio.file.Files.delete(Files.java:1126)
	at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:156)
	at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:132)
	at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:137)
	... 5 more
4

This sort of error could be caused by your antivirus software. Try TEMPORARILY disabling your antivirus for a single compilation to see if the problem goes away, then turn the antivirus back on. If the problem doesn't occur with the antivirus off you will need to adjust the settings of your antivirus to whitelist the appropriate file, folder, or process so it doesn't interfere with compilation.

5

Turned off all protection. Performed steps again and got the same error messages.

6

Congratulations if you could decipher the meaning of my last reply. That was a copy paste reply, but I forgot that it was tailored to compilation issues and I needed to modify it to make sense for Boards Manager issues. Sorry for any confusion that caused.

Try this:

  • (In the Arduino IDE) File > Preferences
  • Click the link at the line following "More preferences can be edited directly in the file". This will open the Arduino15 (or similar name depending on OS) folder.
  • Delete all files in that folder except for preferences.txt. Please be very careful when deleting things on your computer. When in doubt, back up!

Now try opening Boards Manager again to see if that fixed the problem.

7

thank you very much!!
It solved several problems.

8

You're welcome. I'm glad to hear it's working now. Enjoy!
Per