# No g code preview

**URL:** <https://forum.snapmaker.com/t/no-g-code-preview/6174>\
**Category:** Snapmaker Luban\
**Created:** [April 20, 2020, 12:30pm UTC](https://forum.snapmaker.com/t/no-g-code-preview/6174 "2020-04-20T12:30:29Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rorschach239](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@Rorschach239](https://forum.snapmaker.com/u/Rorschach239)\
**Post date:** [April 20, 2020, 12:30pm UTC](https://forum.snapmaker.com/t/no-g-code-preview/6174/1 "2020-04-20T12:30:29Z")

</div>

Using snapmaker luban 3.4.2 and i am not able to get the preview after generating the g code for printing to show the layers.

Just shows the grey image of the file but no layers, works sometimes and i have no idea why it is doing it.

I even downgraded to 3.1.1 and still does the same thing.

---

<div class="post-metadata">

**Author:** ![xchrisd](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/xchrisd/32/1503_2.png) [@xchrisd](https://forum.snapmaker.com/u/xchrisd)\
**Post date:** [April 20, 2020, 12:49pm UTC](https://forum.snapmaker.com/t/no-g-code-preview/6174/2 "2020-04-20T12:49:44Z")

</div>

Hey what OS do you use?  
WIN, MAC, Linux?