ng 意外关闭并给出错误 127。为什么会发生这种情况？答案

【问题标题】：ng has unexpectedly closed giving the error 127.why this happens?ng 意外关闭并给出错误 127。为什么会发生这种情况？
【发布时间】：2020-11-02 17:27:26
【问题描述】：

我正在尝试从脚本构建应用程序。但是，在尝试运行“离子服务”时。它显示如下错误：

[错误] 错误：作业名称“..getProjectMetadata”不存在。

at Observable._subscribe (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\src\experimental\jobs\simple-scheduler.js:350:23)

at Observable._trySubscribe (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\Observable.js:44:25)

at Observable.subscribe (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\Observable.js:30:22)

at C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\util\subscribeTo.js:22:31

at Object.subscribeToResult (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\util\subscribeToResult.js:10:45)

at SwitchMapSubscriber._innerSub (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\operators\switchMap.js:65:54)

at SwitchMapSubscriber._next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\operators\switchMap.js:55:14)

at SwitchMapSubscriber.Subscriber.next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\Subscriber.js:66:18)

at SwitchMapSubscriber.notifyNext (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\operators\switchMap.js:86:26)

at InnerSubscriber._next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\InnerSubscriber.js:28:21)

at InnerSubscriber.Subscriber.next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\Subscriber.js:66:18)

at C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\util\subscribeTo.js:17:28

at Object.subscribeToResult (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\util\subscribeToResult.js:10:45)

at SwitchMapSubscriber._innerSub (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\operators\switchMap.js:65:54

at SwitchMapSubscriber._next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\operators\switchMap.js:55:14)

at SwitchMapSubscriber.Subscriber.next (C:\Users\Bhanu\Desktop\Food Grocery  Meat Delivery Mobile App with Admin Panel V2.0\Ionic Mobile App Code\Foodland_user\foodlands_user_v2.0\node_modules\@angular-devkit\core\node_modules\rxjs\internal\Subscriber.js:66:18)

【问题讨论】：

标签： angular cordova ionic-framework npm ionic4

【解决方案1】：

这似乎是@angular-devkit/build-angular 的问题。尝试将其降级为特定版本，如下所示：

npm i @angular-devkit/build-angular@0.803.24 应该可以正常工作:)

更多信息here

【讨论】：