The Angular 2 application could not find the specified path at http://localhost:3002/traceur, resulting in a

I recently upgraded my SPA from @angular RC5 to the official release. While everything was functioning properly in development before the upgrade with no errors in the chrome debug console, I now encounter an issue.

After updating my package.json file to include:

 "dependencies": {
    "@angular/common": "~2.0.1",
    "@angular/compiler": "~2.0.1",
    "@angular/core": "~2.0.1",
    "@angular/forms": "~2.0.1",
    "@angular/http": "~2.0.1",
    "@angular/platform-browser": "~2.0.1",
    "@angular/platform-browser-dynamic": "~2.0.1",
    "@angular/router": "~3.0.1",
    "es6-shim": "^0.35.0",
    "lodash": "^4.14.1",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.6",
    "systemjs": "0.19.27",
    "underscore": "^1.8.3",
    "zone.js": "^0.6.12"
  },

In addition, I removed certain ROUTER_PROVIDER references and all multi-line comments. However, upon running my application again, I encountered the following error:

zone.js:1274 GET http://localhost:3002/traceur 404 (Not Found)scheduleTask @ zone.js:1274ZoneDelegate.scheduleTask @ zone.js:216Zone.scheduleMacroTask @ zone.js:153(anonymous function) @ zone.js:1304send @ VM1437:3fetchTextFromURL @ system.src.js:1156(anonymous function) @ system.src.js:1739ZoneAwarePromise @ zone.js:478(anonymous function) @ system.src.js:1738(anonymous function) @ system.src.js:2764(anonymous function) @ system.src.js:3338(anonymous function) @ system.src.js:3605(anonymous function) @ system.src.js:3990(anonymous function) @ system.src.js:4453(anonymous function) @ system.src.js:4705(anonymous function) @ system.src.js:408ZoneDelegate.invoke @ zone.js:203Zone.run @ zone.js:96(anonymous function) @ zone.js:462ZoneDelegate.invokeTask @ zone.js:236Zone.runTask @ zone.js:136drainMicroTaskQueue @ zone.js:368ZoneTask.invoke @ zone.js:308
zone.js:355 Unhandled Promise rejection: Error: XHR error (404 Not Found) loading http://localhost:3002/traceur
        at XMLHttpRequest.wrapFn [as _onreadystatechange] (http://localhost:3002/vendor/zone.js/dist/zone.js:647:29)
        at ZoneDelegate.invokeTask (http://localhost:3002/vendor/zone.js/dist/zone.js:236:37)
        at Zone.runTask 
(http://localhost:3002/vendor/zone.js/dist/zone.js:136:47)
        at XMLHttpRequest.ZoneTask.invoke (http://localhost:3002/vendor/zone.js/dist/zone.js:304:33)
    Error loading http://localhost:3002/traceur
    Error loading http://localhost:3002/vendor/@angular/platform-browser-dynamic/index.js as "@angular/platform-browser-dynamic" from http://localhost:3002/app/main.js ; Zone: <root> ; Task: Promise.then ; Value: Error: Error: XHR error (404 Not Found) loading http://localhost:3002/traceur(…) nullconsoleError @ zone.js:355_loop_1 @ zone.js:382drainMicroTaskQueue @ zone.js:386ZoneTask.invoke @ zone.js:308
zone.js:357 Error: Uncaught (in promise): Error: Error: XHR error (404 Not Found) loading http://localhost:3002/traceur(…)consoleError @ zone.js:357_loop_1 @ zone.js:382drainMicroTaskQueue @ zone.js:386ZoneTask.invoke @ zone.js:308
13system.src.js:373 Assertion failed: loading or loaded(anonymous function) @ system.src.js:373ZoneDelegate.invoke @ zone.js:203Zone.run @ zone.js:96(anonymous function) @ zone.js:462ZoneDelegate.invokeTask @ zone.js:236Zone.runTask @ zone.js:136drainMicroTaskQueue @ zone.js:368ZoneTask.invoke @ zone.js:308

Despite reading various threads with similar issues, I haven't been able to pinpoint the cause of this problem. Any insights would be greatly appreciated!

angulartypescript

Answer №1

Error 404 in traceur indicates that Angular is struggling to locate or load necessary components or packages. Based on your explanation, I can offer the following suggestions:

1) Ensure that your package.json file is accurate. Compare it with the one found here.

2) Make sure that zone.js is at a higher version compatible with Angular 2.0.1.

3) The shim es6-shim": "^0.35.0" is no longer needed in the latest versions. Remove any reference of it from your index.html file as well.

There could be other potential reasons for the problem, but without more information, it's difficult to pinpoint exactly what they may be.

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