# preCICE stops during "setting up primary communication to coupling partner"

**URL:** <https://precice.discourse.group/t/precice-stops-during-setting-up-primary-communication-to-coupling-partner/1757>\
**Category:** Using preCICE\
**Tags:** coupling-schemes\
**Created:** [January 26, 2024, 11:17am UTC](https://precice.discourse.group/t/precice-stops-during-setting-up-primary-communication-to-coupling-partner/1757 "2024-01-26T11:17:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Makis](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/makis/32/25_2.png) [@Makis](https://precice.discourse.group/u/Makis)\
**Post date:** [January 28, 2024, 9:28pm UTC](https://precice.discourse.group/t/precice-stops-during-setting-up-primary-communication-to-coupling-partner/1757/2 "2024-01-28T21:28:43Z")

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Hi @Martin_Wilens,

I could imagine that this is related to some network detail. I am particularly wondering why this is failing in the Vagrant box.

Is this a macOS system? Is this a restrictive network?

See also:

> [@Help! The participants are not finding each other!](https://precice.discourse.group/t/help-the-participants-are-not-finding-each-other/646/3):
>
> See also [preCICE hangs during initialization](https://precice.discourse.group/t/precice-hangs-during-initialization/33)

as well as:

> **[Communication configuration | preCICE - The Coupling Library](https://precice.org/configuration-communication.html)**
>
> A very basic ingredient to coupling is communication. The participants you want to couple need to be able to communicate data. On this page, we explain how communication between participants can be configured.

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