# Wind analysis with butterfly - cannot mesh the model

**URL:** <https://discourse.ladybug.tools/t/wind-analysis-with-butterfly-cannot-mesh-the-model/10873>\
**Category:** butterfly\
**Tags:** airflow\
**Created:** [September 3, 2020, 10:37am UTC](https://discourse.ladybug.tools/t/wind-analysis-with-butterfly-cannot-mesh-the-model/10873 "2020-09-03T10:37:14Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![hoganchan](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/h/c89c15/32.png) [@hoganchan](https://discourse.ladybug.tools/u/hoganchan)\
**Post date:** [September 3, 2020, 10:37am UTC](https://discourse.ladybug.tools/t/wind-analysis-with-butterfly-cannot-mesh-the-model/10873/1 "2020-09-03T10:37:14Z")

</div>

Hi all,

I am trying to simulate the wind flow in the built environment with Butterfly. After I generate the wind tunnel, I am not able to mesh the model. The error message is “1. Solution exception:WindowsError” and I have no idea for solving this problem.

The attached is the building I want to test and the gh script. Thank you in advance.

-HC

[outdoor\_airflow.gh](https://discourse.ladybug.tools/uploads/short-url/z6oY5mDWEOKavBAoZILkct0gJx2.gh) (445.5 KB)  
[https://drive.google.com/drive/folders/1-L0I5AQCq6XMXf-a0hkny1umBF6Rvj5z?usp=sharing](https://drive.google.com/drive/folders/1-L0I5AQCq6XMXf-a0hkny1umBF6Rvj5z?usp=sharing)