Arduino IDE v1.8.12 is not opening
can anyone help this is what i get when i run arduino_debug.exe
Set log4j store directory C:\Users%username%\Appdata\Local\Arduino 15
Loading configuration.....
Initializing Packages.....
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.jave:273)
at processing.app.Base.main(Base.java:150)
Note:- I have tried to install the app again but the problem presists
please help
Deleting Arduino15 will indeed fix the problem, but it's more than what's necessary and will result in you needing to reinstall any boards you might have installed via Boards Manager.
Here are the official instructions for fixing the problem when using the standard Windows version of the Arduino IDE (as it appears @tds_yt is using):
There was a problem with Arduino's package_index.json file used for Boards Manager that caused the NullPointerException error and prevented the IDE from starting.
Now the package_index.json file has been fixed, but to recover the Arduino IDE to a working condition you must delete the bad package_index.json from your computer as well as the cache folder, then restart the Arduino IDE as usual.
NOTE: These are in hidden folders. You will need to configure your file browser software to show hidden folders in order to see them.
Please note that the problem that caused the Arduino IDE to break from the bad package index file has already been fixed and will be in the next release of the IDE. That's the reason why the Nightly/Beta Builds are not affected, and also the reason why we did not detect this problem earlier.
