npm-install command not working in an angular 7 project

Question

I downloaded a project from git, which is written in angular 7. I just need to run command npm install to run it. But its showing the following error.

npm ERR! code E404
npm ERR! 404 Not Found: [email protected]

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/abhiz/.npm/_logs/2019-04-24T07_30_14_888Z-debug.log

The following is a small part of the detailed error report from the log file(/home/abhiz/.npm/_logs/2019-04-24T07_30_14_888Z-debug.log).

    ... ... ...
    ... ... ...
    23 silly saveTree | `-- [email protected]
    23 silly saveTree |   `-- [email protected]
    23 silly saveTree `-- [email protected]
    24 verbose stack Error: 404 Not Found: [email protected]
    24 verbose stack     at fetch.then.res (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/pacote/lib/fetchers/registry/fetch.js:42:19)
    24 verbose stack     at tryCatcher (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/util.js:16:23)
    24 verbose stack     at Promise._settlePromiseFromHandler (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:512:31)
    24 verbose stack     at Promise._settlePromise (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:569:18)
    24 verbose stack     at Promise._settlePromise0 (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:614:10)
    24 verbose stack     at Promise._settlePromises (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/promise.js:693:18)
    24 verbose stack     at Async._drainQueue (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:133:16)
    24 verbose stack     at Async._drainQueues (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:143:10)
    24 verbose stack     at Immediate.Async.drainQueues [as _onImmediate] (/home/abhiz/.nvm/versions/node/v10.0.0/lib/node_modules/npm/node_modules/bluebird/js/release/async.js:17:14)
    24 verbose stack     at runCallback (timers.js:696:18)
    24 verbose stack     at tryOnImmediate (timers.js:667:5)
    24 verbose stack     at processImmediate (timers.js:649:5)
    25 verbose cwd /home/abhiz/WorkSpace/TreadFormAnalysis
    26 verbose Linux 4.15.0-47-generic
    27 verbose argv "/home/abhiz/.nvm/versions/node/v10.0.0/bin/node" "/home/abhiz/.nvm/versions/node/v10.0.0/bin/npm" "install"
    28 verbose node v10.0.0
    29 verbose npm  v6.4.1
    30 error code E404
    31 error 404 Not Found: [email protected]
    32 verbose exit [ 1, true ]

Only for this project npm install is not working. I have tried running this command in another angular 7 project and it run successfully. What is " [email protected] " and how to resolve this error?

These informations may be needed. My system's npm -version is 6.4.1 and node version is 10.0.In this project web socket is used.

Package.json file

        {
      "name": "app-demo",
      "version": "0.0.0",
      "scripts": {
        "ng": "ng",
        "start": "ng serve",
        "build": "ng build",
        "test": "ng test",
        "lint": "ng lint",
        "e2e": "ng e2e"
      },
      "private": true,
      "dependencies": {
        "@angular/animations": "^6.1.3",
        "@angular/cdk": "^6.4.6",
        "@angular/common": "^6.0.0",
        "@angular/compiler": "^6.0.0",
        "@angular/core": "^6.0.0",
        "@angular/forms": "^6.0.0",
        "@angular/http": "^6.0.0",
        "@angular/material": "^6.4.6",
        "@angular/platform-browser": "^6.0.0",
        "@angular/platform-browser-dynamic": "^6.0.0",
        "@angular/router": "^6.0.0",
        "@ng-bootstrap/ng-bootstrap": "^3.2.0",
        "@ngx-loading-bar/core": "^4.1.1",
        "@ngx-loading-bar/http-client": "^4.0.0",
        "angular-svg-round-progressbar": "^2.0.0",
        "angular2-cookie": "^1.2.6",
        "angular2-toaster": "^6.1.0",
        "bootstrap": "^3.3.7",
        "core-js": "^2.5.4",
        "file-saver": "^2.0.0",
        "jquery": "^3.3.1",
        "jwt-decode": "^2.2.0",
        "lodash": "^4.17.11",
        "net": "1.0.2",
        "ng-connection-service": "^1.0.4",
        "ngx-bootstrap": "^3.1.4",
        "ngx-cookie-service": "^1.0.10",
        "ngx-spinner": "^6.1.2",
        "ngx-toggle-switch": "^2.0.5",
        "rxjs": "^6.2.2",
        "sockjs-client": "^1.3.0",
        "stompjs": "^2.3.3",
        "xlsx": "^0.14.1",
        "zone.js": "^0.8.26"
      },
      "devDependencies": {
        "@angular-devkit/build-angular": "^0.6.8",
        "@angular/cli": "~6.0.0",
        "@angular/compiler-cli": "^6.0.0",
        "@angular/language-service": "^6.0.0",
        "@types/jasmine": "~2.8.6",
        "@types/jasminewd2": "~2.0.3",
        "@types/node": "~8.9.4",
        "codelyzer": "~4.2.1",
        "jasmine-core": "~2.99.1",
        "jasmine-spec-reporter": "~4.2.1",
        "karma": "^3.0.0",
        "karma-chrome-launcher": "~2.2.0",
        "karma-coverage-istanbul-reporter": "~1.4.2",
        "karma-jasmine": "~1.1.1",
        "karma-jasmine-html-reporter": "^0.2.2",
        "protractor": "^5.4.1",
        "ts-node": "~5.0.1",
        "tslint": "~5.9.1",
        "typescript": "~2.7.2",
        "net": "1.0.2",
        "angular-svg-round-progressbar": "2.0.0",
        "ng-connection-monitor": "0.0.0"
      }
    }

@Abhiz well npm install is installing your dependencies defined in the package.json file. Different projects have different dependencies. Here 1 of your dependencies are failing. Can you show your package.json file? - it is rather impossible to debug without. It tries to install version 0.0.0 of ng-connection-monitior - this seems pretty odd. — Jonas Praem
– Jonas Praem, Commented Apr 24, 2019 at 8:06

Nathan · Accepted Answer · 2019-04-24 08:20:42Z

2

This is because the project you downloaded requires the ng-connection-monitor library as a build dependency and npm was unable to find this library when you did an npm install. Looking on npmjs for ng-connection-monitor returns no results so this would explain your 404 error:

404 Not Found: [email protected]

This leads me to believe that this module is either a private package or has since been deleted off of npmjs... so you will be unable to download this required build dependency as listed within your package.json file. Alternatively, there is however a ng-connection-service module listed on npmjs.

Perhaps you could proceed as follows:

Try removing this dependency from your package.json file and see if your project still builds and works appropriately. Alternatively, maybe try to get in contact with the author of the GIT repo you've cloned and see what the deal is with this module? As previously mentioned, this module may now be deprecated and has been replaced with another module so it was removed off of npmjs or it's a private module which isn't made publicly available on npmjs.

Hopefully that helps!

answered Apr 24, 2019 at 8:20

Nathan

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2 Comments

Abhiz Over a year ago

Thanks for such a brief answer. It helped.

Nathan Over a year ago

Glad it helped, please consider accepting my answer

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