Getting error on ng serve: ERROR in Cannot read property 'listLazyRoutes' of undefined

Question

When running ng serve in command-line for an angular-cli generated project, I am getting error below:

 ERROR in Cannot read property \'listLazy         


        

Answer 1

Update angular-cli to latest: npm install -g angular-cli@latest

And in my particular case, I updated the package.json to this:

"dependencies": {
    "@angular/common": "^2.4.0",
    "@angular/compiler": "^2.4.0",
    "@angular/core": "^2.4.0",
    "@angular/forms": "^2.4.0",
    "@angular/http": "^2.4.0",
    "@angular/platform-browser": "^2.4.0",
    "@angular/platform-browser-dynamic": "^2.4.0",
    "@angular/router": "~3.4.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.0.1",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.7.2"
  },
  "devDependencies": {
    "@angular/compiler-cli": "^2.3.1",
    "@types/jasmine": "2.5.38",
    "@types/node": "^6.0.42",
    "angular-cli": "1.0.0-beta.24",
    "codelyzer": "~2.0.0-beta.1",
    "jasmine-core": "2.5.2",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.2.1",
    "protractor": "4.0.13",
    "ts-node": "1.2.1",
    "tslint": "^4.0.2",
    "typescript": "~2.0.3",
    "webdriver-manager": "10.2.5"
  }

Perform npm install with this package.json content and it'll work.

Answer 2

This worked for me ERROR in Cannot read property 'listLazyRoutes' of undefined

But I also needed to re install my @angular/core

Answer 3

I was able to fix the issue by upgrading the angular-cli generated project to angular-cli: 1.0.0-beta.24. If you generated the project from previous version (eg. *-beta.22 in my case), upgrade the local project package(dev dependencies) by running commands below:

>rm -rf node_modules dist tmp
>npm install --save-dev angular-cli@latest
>npm install
>ng init

To upgrade to new angular-cli, run commands below in the command-line:

>npm uninstall -g angular-cli
>npm cache clean
>npm install -g angular-cli@latest

Update on 2/23/2017: Syntax changed in getting latest angular-cli. Use command below instead:

npm install --save-dev @angular/cli@latest