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# How do I fix the "Can't acquire lock for app" error?

![](https://hodi.host/images/kb/84_Screenshot-2023-05-07-at-07.57.29.png)

If you get a `Can't acquire lock for app` error when trying to launch your Node.JS application, the most likely cause is that a script you started via `Run NPM Script` is still running.

Unfortunately, you cannot stop it from the interface.

You will need to [connect via SSH](https://help.hodi.host/en/article/how-do-i-access-my-hosting-via-ssh-143pq07/), and view the running processes with the `ps ax` command:

[mapetite@run1 ~]$ ps ax
PID TTY STAT TIME COMMAND
2509284 ? Sl 0:01 npm run-script start
2509375 ? Sl 0:02 /opt/alt/alt-nodejs18/root/usr/bin/node index.mjs
3127505 ? S 0:00 /bin/bash ./run.sh
3127510 ? S 0:00 /bin/bash /home/mapetite/actions-runner/run-helper.sh
3127515 ? Sl 4:04 /home/mapetite/actions-runner/bin/Runner.Listener run
3825502 ? S 0:00 /opt/alt/python37/bin/python3 -sbb /usr/share/l.v.e-manager/utils/cloudlinux-cli-user.py
3825694 ? Sl 0:01 npm run-script start
3825969 ? Sl 0:02 /opt/alt/alt-nodejs18/root/usr/bin/node index.mjs
4089815 pts/4 Ss 0:00 -bash
4090255 pts/4 R+ 0:00 ps ax

This is usually the `/opt/alt/python37/bin/python3 -sbb /usr/share/l.v.e-manager/utils/cloudlinux-cli-user.py` process; you can stop it by running the `kill -9 XXX` command, with `XXX` being the PID of the process in question (first column of the information shown by `ps ax`, `3825502` in the example above).

If you can't locate it or can't manage to stop it, feel free to contact [our technical support](https://hodi.host/submitticket.php?step=2&deptid=2).