Jan 03, 2021 2 mins

An unhandled exception occurred: npm notice

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I have an Angular 10 application and I'm trying to upgrade it to Angular 11. But while running the command below, I'm getting an Angular notice error.

Update Command

ng update @angular/core@11 @angular/cli@11


An unhandled exception occurred: npm notice
npm notice New minor version of npm available! 9.2.0 -> 9.6.6
npm notice Changelog: <;
npm notice Run `npm install -g npm@9.6.6` to update!
npm notice
npm ERR! code EACCES
npm ERR! syscall link
npm ERR! path /Users/<username>/.npm/_cacache/tmp/d7d54e04
npm ERR! dest /Users/<username>/.npm/_cacache/content-v2/sha512/61/40/3ed62d0502002ead4f8638390a65fc3df875298d82ed7810f4629de79c3f40cba9aa33fdffa5e6a829b85e9fd293f124c117559dd7ffd864872f8566d950
npm ERR! errno EACCES
npm ERR!
npm ERR! Your cache folder contains root-owned files, due to a bug in
npm ERR! previous versions of npm which has since been addressed.
npm ERR!
npm ERR! To permanently fix this problem, please run:
npm ERR! sudo chown -R 501:20 "/Users/<username>/.npm"
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/<username>/.npm/_logs/2023-05-05T15_05_04_637Z-debug-0.log
Package install failed, see above.
See "/private/var/folders/_n/6hwp_mtj08b73s00rrj3b1900000gn/T/ng-Q6zbpv/angular-errors.log" for further details.

Why is This Error?

An unhandled exception occurred during the execution of an npm (Node Package Manager) command, as indicated by the error message “An unhandled exception occurred: npm notice”. This error typically arises during package installation, update, or other npm-related operations.

Possible Solutions

Check npm Logs: Examine the full error message for additional details or stack traces.

Network Issues: Ensure a stable network connection and retry the npm command.

Dependency Issues: Review project dependencies and versions specified in the package.json file.

Update npm: Ensure npm is up-to-date by running npm install -g npm in the terminal.

Clean Install: Delete the node_modules directory and package-lock.json or yarn.lock file (if present), then run npm install again.

By investigating error details and addressing issues with dependencies, network connectivity, or npm version, you can work towards resolving the “An unhandled exception occurred: npm notice” error.


  • Avatar

    Danielle Carline

    Posted on

    In your case, as the error logs suggested, you don’t have enough permission to run npm install -g npm@9.6.6 command. Try the same command with sudo in Mac or Linux enviroment. In Windows, try in a console with Adminitation privileges.

    sudo npm install -g npm@9.6.6

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