Arduino IDE can not open ！Something must be wrong ！

[xp187oo]

java.lang.NullPointerException
at cc.arduino.contributions.packages.ContributionsIndexer.parseIndex(ContributionsIndexer.java:134)
at processing.app.BaseNoGui.initPackages(BaseNoGui.java:483)
at processing.app.Base.(Base.java:273)
at processing.app.Base.main(Base.java:150)

[akhilgkrishnan]

@xp187oo I am facing the same issue. when i open board manager

[hmeijdam]

If you look at the forum https://forum.arduino.cc/index.php?board=2.0 you will see that everyone has this problem. One of the files that the "boards manager" is downloading must cause a data corruption. I have it in the older IDE versions also, so not just 1.8.12

[JAndrassy]

it looks like Arduino's package_index.json is the corrupted one. no way around

[imrehorvath]

Duplicate of #10340

[JAndrassy]

problem is a new section arduino-beta for Portenta H7 in Arduino's package_index.json

the tools section is missing for the new package

[cmaglie]

We had a problem on our package_index.json that caused the error and prevented the IDE to start.
Now the package_index has been fixed, but to recover a working installation you must delete once again the package_index.json with the cache folder and restart the IDE as usual.

Windows:

• remove file C:\Users\YourUsername\AppData\Local\Arduino15\package_index.json
• remove folder C:\Users\YourUsername\AppData\Local\Arduino15\cache

Mac:

• remove file /Users/YourUsername/Library/Arduino15/package_index.json
• remove folder /Users/YourUsername/Library/Arduino15/cache

Linux:

• remove file /home/YourUsername/.arduino15/package_index.json
• remove folder /home/YourUsername/.arduino15/cache

Please note that the problem that prevents the IDE to start has already been fixed and it's ready for the next release, that's the reason why the Nightly/Beta Builds are not affected, and also the reason why we did not detect this problem earlier, sorry about that!

[Hamid11300]

We had a problem on our package_index.json that caused the error and prevented the IDE to start.
Now the package_index has been fixed, but to recover a working installation you must delete once again the package_index.json with the cache folder and restart the IDE as usual.

Windows:

• remove file C:\Users\YourUsername\AppData\Local\Arduino15\package_index.json
• remove folder C:\Users\YourUsername\AppData\Local\Arduino15\cache

Mac:

• remove file /Users/YourUsername/Library/Arduino15/package_index.json
• remove folder /Users/YourUsername/Library/Arduino15/cache

Linux:

• remove file /home/YourUsername/.arduino15/package_index.json
• remove folder /home/YourUsername/.arduino15/cache

Please note that the problem that prevents the IDE to start has already been fixed and it's ready for the next release, that's the reason why the Nightly/Beta Builds are not affected, and also the reason why we did not detect this problem earlier, sorry about that!

Big Like

[xp187oo]

Thank you for replay，man.   I had empty C:\Users\YourUsername\AppData\Local\Arduino15\   and  it works .    

…

------------------&nbsp;原始邮件&nbsp;------------------ 发件人: "Hamid11300"<[email protected]&gt;; 发送时间: 2020年6月16日(星期二) 下午2:25 收件人: "arduino/Arduino"<[email protected]&gt;; 抄送: "呵呵"<[email protected]&gt;; "Mention"<[email protected]&gt;; 主题: Re: [arduino/Arduino] Arduino IDE can not open ！Something must be wrong ！ (#10341) We had a problem on our package_index.json that caused the error and prevented the IDE to start. Now the package_index has been fixed, but to recover a working installation you must delete once again the package_index.json with the cache folder and restart the IDE as usual. Windows: remove file C:\Users\YourUsername\AppData\Local\Arduino15\package_index.json remove folder C:\Users\YourUsername\AppData\Local\Arduino15\cache Mac: remove file /Users/YourUsername/Library/Arduino15/package_index.json remove folder /Users/YourUsername/Library/Arduino15/cache Linux: remove file /home/YourUsername/.arduino15/package_index.json remove folder /home/YourUsername/.arduino15/cache Please note that the problem that prevents the IDE to start has already been fixed and it's ready for the next release, that's the reason why the Nightly/Beta Builds are not affected, and also the reason why we did not detect this problem earlier, sorry about that! Big Like — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.