IONIC : A utility CLI has unexpectedly closed

Question

I got this error when i run ionic serve The Ionic CLI will exit. Please check any output above for error details.

my ionic info

$ionic info
Ionic:

   ionic (Ionic CLI)  : 4.0.1 (C:\Users\Pc\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.1.8

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0

System:

   Android SDK Tools : 25.3.1
   NodeJS            : v6.10.1 (C:\Program Files\nodejs\node.exe)
   npm               : 5.3.0
   OS                : Windows 10

Environment:

   ANDROID_HOME : C:\Users\Pc\AppData\Local\Android\sdk

score 44 · Accepted Answer · edited Aug 03 '19 at 12:15

44

Run the below command, being in root directory of Ionic project:

npm install @ionic/app-scripts@latest --save-dev

Then you can try Ionic serve or Ionic s.

edited Aug 03 '19 at 12:15

CodeChanger

7,953
5
49
80

answered Jul 29 '18 at 10:19

Rakesh Mishra

472
4
3

score 8 · Answer 2 · edited Jun 20 '20 at 09:12

8

I had a similar issue:

Assertion `args[1]->IsString()' failed.

A utility CLI has unexpectedly closed

I fixed that by installing natives lib through npm:

npm i natives

edited Jun 20 '20 at 09:12

Community

1
1

answered Oct 08 '18 at 09:11

Nourdine Alouane

804
12
22

score 7 · Answer 3 · answered Jan 26 '20 at 15:53

7

Simpy run

npm install @ionic/app-scripts@latest --save-dev

and then

ionic serve

This error is because of some audit during installing a plugin or adding a plug in

answered Jan 26 '20 at 15:53

N.Balgopal Patro

175
2
4

score 6 · Answer 4 · answered Dec 06 '18 at 03:41

I had a similar issue. I tried several different solutions, and for some reason different ones worked on different machines. Because I'm an illogical masochist, I attempted to fix this issue in the same project on 3 different laptops instead of sending the new fixed version to the other laptops.

The best answer I came up with is to:

Delete node_modules
copy node_modules from a different project (I used an earlier version of my app)
run npm i to install any missing modules

I think this approach should work for almost all instances.

score 4 · Answer 5 · answered Aug 02 '18 at 13:54

4

You must kill the NodeJs service I believe it's a bug

answered Aug 02 '18 at 13:54

Vagner Sabadi

59
4

how can i kill it in windows10? can i close then open vscode again? or you mean stop start services? i run ionic serve in one of my projects. second one working good but first one didnt work as well and this error happened... i dont know why? when copy node_modules from first one to another thats worked fine. but after some days this error returned back to my house – saber tabatabaee yazdi Jun 26 '19 at 15:03
From the task manager, nodejs must appear to kill. Currently I am not facing this problem maybe it is necessary to update node – Vagner Sabadi Jun 27 '19 at 16:48

score 3 · Answer 6 · edited Apr 07 '19 at 19:13

3

Try running:

npm install @ionic/lab

edited Apr 07 '19 at 19:13

Cody Gray - on strike

239,200
50
490
574

answered Jul 28 '18 at 19:33

Abdennaji Firas

25
4

score 3 · Answer 7 · answered Aug 07 '18 at 11:38

3

Try replacing the package.json scripts parts. Worked for me.

  "scripts": {
    "build": "ionic build",
    "serve": "ionic build",
    "start": "npm run serve"
  },

answered Aug 07 '18 at 11:38

ChamathPali

83
7

score 1 · Answer 8 · answered Feb 28 '20 at 15:44

1

Maybe there is an issue in your hosts file. Make sure your ::1 should enable or not commented.

Example:

answered Feb 28 '20 at 15:44

Rahul Sharma

622
7
25

score 0 · Answer 9 · answered Jul 18 '20 at 15:03

0

I don't know why but using sudo was the only way to solve this on my ubuntu machine! I just needed to run the command using sudo:

sudo ionic serve

answered Jul 18 '20 at 15:03

basilisk

1,156
1
14
34

score 0 · Answer 10 · answered Sep 09 '20 at 18:15

Error: Lock found, but no process with PID 43470 seems to be running. [ng] (If you are sure no ngcc process is running then you should delete the lock-file at yourproject/node_modules/@angular/compiler-cli/ngcc/ngcc_lock_file.)

rm yourproject/node_modules/@angular/compiler-cli/ngcc/ngcc_lock_file

et voila.

score 0 · Answer 11 · answered Mar 23 '21 at 06:26

0

if you get this in the log:

The target entry-point "@ionic-native/media-capture" has missing dependencies:

@ionic-native/core

try this,

npm install --save @ionic-native/core

answered Mar 23 '21 at 06:26

nativelectronic

646
4
11

score 0 · Answer 12 · answered May 25 '21 at 15:53

0

My solution: Upgrade Angular. It'll reveal the real reason for unexpectedly closing in a more verbouse error message. Mine was incompatible dependencies. I simply edited package.json with the right depencies, and ran npm update

answered May 25 '21 at 15:53

Cedric Ipkiss

5,662
2
43
72

score 0 · Answer 13 · answered Jul 06 '21 at 18:12

0

For any Linux Users: This error might occur if you installed node.js via the snapstore. Either change PATH to /usr/local/bin/node or use npm to update/install node.js again at the right place.

answered Jul 06 '21 at 18:12

B4ldur

11
2

IONIC : A utility CLI has unexpectedly closed

13 Answers13

Linked