# How LibrePCB knows that someone already have these workspace opened?

**URL:** <https://librepcb.discourse.group/t/how-librepcb-knows-that-someone-already-have-these-workspace-opened/288>\
**Category:** Help\
**Created:** [October 6, 2020, 3:53pm UTC](https://librepcb.discourse.group/t/how-librepcb-knows-that-someone-already-have-these-workspace-opened/288 "2020-10-06T15:53:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![mesmariusz](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@mesmariusz](https://librepcb.discourse.group/u/mesmariusz)\
**Post date:** [October 6, 2020, 3:53pm UTC](https://librepcb.discourse.group/t/how-librepcb-knows-that-someone-already-have-these-workspace-opened/288/1 "2020-10-06T15:53:30Z")

</div>

Hi

How LibrePCB knows that someone already have these workspace opened?

![](https://global.discourse-cdn.com/free1/uploads/librepcb1/original/1X/f4deda457f6ec06af998684446ff84e98cc79aa4.png)

Please note that I have the workspace synchronized between a few computers (bidirectionally) using [https://syncthing.net/](https://syncthing.net/)

---

<div class="post-metadata">

**Author:** ![ubruhin](https://avatars.discourse-cdn.com/v4/letter/u/c89c15/32.png) [@ubruhin](https://librepcb.discourse.group/u/ubruhin)\
**Post date:** [October 17, 2020, 8:15pm UTC](https://librepcb.discourse.group/t/how-librepcb-knows-that-someone-already-have-these-workspace-opened/288/2 "2020-10-17T20:15:15Z")

</div>

LibrePCB creates a file named `.lock` within the `v0.1` directory of the workspace. It gets removed when closing LibrePCB.