# GHpython runtime error

**URL:** <https://discourse.mcneel.com/t/ghpython-runtime-error/147889>\
**Category:** Grasshopper\
**Tags:** windows\
**Created:** [September 16, 2022, 3:08pm UTC](https://discourse.mcneel.com/t/ghpython-runtime-error/147889 "2022-09-16T15:08:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![user883](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/user883/32/676385_2.png) [@user883](https://discourse.mcneel.com/u/user883)\
**Post date:** [September 16, 2022, 3:08pm UTC](https://discourse.mcneel.com/t/ghpython-runtime-error/147889/1 "2022-09-16T15:08:06Z")

</div>

Hi ,

I have problem that GHpython throw an error although the syntax and variables are correct

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/d/5/9/d599d32940fa9c263b992818006c46a640f3c885.png)

I checked everything but still throw an error (please check file attached)  
[matrix wall problem.gh](https://discourse.mcneel.com/uploads/short-url/xBcPGl3Y5P3TJbFK4gZb2h70WOd.gh) (2.9 KB)