# Luban 4.11.0 laser toolpath/preview generation issues **URL:** \ **Category:** Snapmaker Luban\ **Tags:** Gcode, Laser\ **Created:** [April 24, 2024, 7:08pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693 "2024-04-24T19:08:31Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![MoviePen](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/moviepen/32/5495_2.png) [@MoviePen](https://forum.snapmaker.com/u/MoviePen)\ **Post date:** [April 24, 2024, 7:08pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693/1 "2024-04-24T19:08:32Z")
Using a Mac (Ventura 13.5.1 OS), I am creating one inch tokens with five different images on them for an event. I had constant problems with processing the toolpath which was only resolved by quitting & restarting multiple times. I would constantly get an error generating and previewing with symptoms similar to [Can't Generate G-code in Luban](https://forum.snapmaker.com/t/cant-generate-g-code-in-luban/28160). In the last (most recent to memory of my troubleshooting) I generated two toolpaths (an image with line engraving and a vector for cutting) for a single token as a test to see if the laser settings were right for my material (1.5mm balsa) and successfully exported it. But when I came back to add toolpaths for the remaining images and generated the gcode, only the first token generated and previewed. I had to save, restart luban, and generate again (no editing done) – this time all of the images generated for the preview & gcode. ---
**Author:** ![MoviePen](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/moviepen/32/5495_2.png) [@MoviePen](https://forum.snapmaker.com/u/MoviePen)\ **Post date:** [April 24, 2024, 7:29pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693/2 "2024-04-24T19:29:27Z")
Update. I just tried to import a jpg image as greyscale, then set a toolpath for Dot, 0.14 fill interval, 5 dwell time and 60% laser power. It won’t generate a preview or gcode. “Failed to generate toolpath and preview” flashes briefly at the bottom of the workspace screen. All of this was in a new file. ---
**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 25, 2024, 6:51pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693/3 "2024-04-25T18:51:55Z")
You need to ask support and troubleshoot with them. Did you try another picture and it’s the same? [https://snapmaker.formcrafts.com/support-ticket](https://snapmaker.formcrafts.com/support-ticket) ---
**Author:** ![MoviePen](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/moviepen/32/5495_2.png) [@MoviePen](https://forum.snapmaker.com/u/MoviePen)\ **Post date:** [April 25, 2024, 7:39pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693/4 "2024-04-25T19:39:16Z")
Yep, a couple of different ones. I can eventually generate a print file (.nc format) - I just have to quit & restart luban. So it looks like a program bug, not a user issue. ---
**Author:** ![Maeflower95](https://avatars.discourse-cdn.com/v4/letter/m/ecb155/32.png) [@Maeflower95](https://forum.snapmaker.com/u/Maeflower95)\ **Post date:** [October 4, 2024, 11:55pm UTC](https://forum.snapmaker.com/t/luban-4-11-0-laser-toolpath-preview-generation-issues/35693/5 "2024-10-04T23:55:47Z")
i just had this issue myself and went to the software page on snapmaker. they say you can download an older version so thats what i was going to do till i seen a 4.13.1 that fixes the bug to generate toolpath. i downloaded that one and it is working just fine now. [Releases · Snapmaker/Luban (github.com)](https://github.com/Snapmaker/Luban/releases)