Another process, with id #######, is currently running ngcc

Question

I'm trying to build and serve my project. It was working properly, I updated it from git and then suddenly when I serve it, there is an Error saying "Another process, with id 29800, is currently running ngcc." I retried "npm i", also restarted the IDE and even pc, but it still says the same.

score 336 · Accepted Answer · edited Feb 27 '22 at 18:06

336

This happens when ngcc (Angular compatibility compiler) is not finished doing what it does, you must have enabled ivy in your Angular project. read here for more info about ivy.

First try to run npm install again, to see if it fixes your problem.
Try to run ngcc manually.
remove this file node_modules/@angular/compiler-cli/ngcc/__ngcc_lock_file__
If none of the above worked, then remove node_modules directory and try npm i again.

edited Feb 27 '22 at 18:06

Raphaël Balet

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answered Apr 09 '20 at 14:00

azerafati

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Deleting the file solved problem. I jumped to step 3 tbh. didn't try other steps. thanks. – hadimbj Apr 09 '20 at 14:09
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If you get this error in angular 9 it suggests doing step 3 and that worked for me. delete `__ngcc_lock_file` – Ian Poston Framer May 15 '20 at 04:23
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Just another question. Why do we have the __ngcc_lock_file in the first place? – Rambou Jun 05 '20 at 17:16
@azerafati how do you run ngcc manually?? I'm trying to run it as in this question: https://stackoverflow.com/questions/69904686/how-to-run-ngcc-with-angular-11-12 – Felipe Centeno Nov 09 '21 at 21:24
Unfortunately the link to the `ivy` documentation is not correct. This is the correct url: https://angular.io/guide/ivy – Gerald Spreer Feb 02 '22 at 07:50
Only step 4 works too! – Nibia Feb 14 '22 at 17:18
related for windows devs deleting `node_modules/`: [What's the fastest way to delete a large folder in Windows?](/q/186737/11107541) – starball May 03 '23 at 02:44
for me, `__ngcc_lock_file__` was located directly inside `node_modules/` so check this before deleting whole folder – Nomik May 19 '23 at 11:32

score 33 · Answer 2 · edited May 03 '23 at 02:46

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My Laptop Crashed and I got this problem after restart. Removing the below file from ionic project solved the problem:

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

The file name may have some leading or trailing underscores in various Angular versions.

edited May 03 '23 at 02:46

starball

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answered Jun 13 '20 at 15:02

Lalit Rane

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It was `node_modules/@angular/compiler-cli/ngcc/__ngcc_lock_file__` on Angular 9.1 – alexandre-rousseau Jun 26 '20 at 13:46

score 10 · Answer 3 · answered Mar 11 '21 at 01:52

10

Fix this all in one easy command:

run npm ci

this will delete node_modules and npm install

answered Mar 11 '21 at 01:52

Ben Yee

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score 7 · Answer 4 · answered Oct 07 '20 at 18:46

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just remove the node_modulesthen run npm i

answered Oct 07 '20 at 18:46

Abdallh Abukhader

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pvolyntsev · Answer 5 · 2023-03-06T22:56:14.797

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This happens when ngcc (Angular compatibility compiler) is not finished doing what it does

In Angular 15 of lock file is changed. To release the lock, execute in project folder

rm node_modules/.ngcc_lock_file

edited Mar 06 '23 at 22:56

answered Mar 06 '23 at 14:04

pvolyntsev

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I think you could convince more users of the helpfulness of your contribution if you would spend some words on explanation. Try for [answer]. – Yunnosch Mar 06 '23 at 14:10

score 2 · Answer 6 · edited Oct 11 '20 at 06:40

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I deleted the file node_modules/@angular/compiler-cli/ngcc/ngcc_lock_file_ from the node_modules folder and its working fine.

edited Oct 11 '20 at 06:40

aalbagarcia

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answered Oct 10 '20 at 14:18

Manoj Tyagi

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score 1 · Answer 7 · answered Dec 30 '21 at 11:38

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simply run rm -rf node_modules && npm install

answered Dec 30 '21 at 11:38

Vinicius Cardoso

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score 0 · Answer 8 · answered Apr 09 '21 at 12:42

deleting lock file in nodes module at the following location will fix this errors

*C:\Users\OneDrive\Desktop\app\node_modules\@angular\compiler-cli\ngcc\src\locking*

delete the lock-file javascript file over there.

if it still shows the same error then delete the entire lock-files folder ,restart command prompt and then it will run

Michael R · Answer 9 · 2021-06-14T14:29:37.140

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Also if above solutions, dosen´t work it could be that the pipeline has too little space to work with side processes. What you could do is go to angular.json and search for this object:

"budgets": [{"type": "initial","maximumWarning": "4mb","maximumError": "5mb"}]

and raise the limits on maximumError for example.

More about budgets here: angular.io/guide

edited Jun 14 '21 at 14:29

answered Jun 14 '21 at 14:12

Michael R

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score 0 · Answer 10 · answered Jul 09 '21 at 07:46

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Had the same issue running angular with a docker file, and like suggested here I deleted ngcc_lock_file BEFORE running npm install

answered Jul 09 '21 at 07:46

AshesAndDust

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score -2 · Answer 11 · answered Jul 22 '20 at 13:35

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Just run

ionic repair

And select Yes

answered Jul 22 '20 at 13:35

Rafael Franco

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To get a better rating, it is advisable to include examples and a bit more details. That way, it is useful for others over than just the OP – mw509 Jul 22 '20 at 14:03
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The OP does not mention using ionic. – Paul John Leonard Aug 27 '20 at 17:14

Another process, with id #######, is currently running ngcc

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