# Missing some complete closed profiles **URL:** \ **Category:** Licensing\ **Created:** [September 9, 2026, 12:55pm UTC](https://forum.lightburnsoftware.com/t/missing-some-complete-closed-profiles/192363 "2026-09-09T12:55:06Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![ednisley](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/ednisley/32/40455_2.png) [@ednisley](https://forum.lightburnsoftware.com/u/ednisley)\ **Post date:** [September 9, 2026, 2:30pm UTC](https://forum.lightburnsoftware.com/t/missing-some-complete-closed-profiles/192363/3 "2026-09-09T14:30:35Z")
> [@HenryM](#): > > green shape encloses a ‘mark’ which does not seem to ‘belong’ to the veneer Because the [`Preview`](https://docs.lightburnsoftware.com/latest/Reference/Preview/) looks good, at least here, dropouts like that suggests a USB communication problem, which is (unfortunately) all too common, between the PC and the laser controller. Some previous discussions explore the situation and suggest solutions: > [@My Cherokee Beast](https://forum.lightburnsoftware.com/t/my-cherokee-beast/107347/149): > > WOO HOO !!! I got everything working right , FINELY !!! What was the problem? It turns out to be the USB to Controller board cable was faulty. That was the only thing I failed to check and that was it. I have a bad habit of buying one to use and one to loose. When I thought about the cable being bad, I got the cable out the spare controller kit and that one worked. I feel really stupid sitting here thinking how I spent 4 to 6 weeks crying and trying to fix this thing and never though… > [@Unusual laser/galvo problem?](https://forum.lightburnsoftware.com/t/unusual-laser-galvo-problem/186750/14): > > Problem solved slightly_smiling_face I checked virtually every connection. I cleaned the entire inside of the laser. I added additional ventilation. I tested two other good quality USB cables. None of the above helped — the laser was still stopping randomly. In a moment of desperation, I remembered an absurdly expensive USB cable that I use for data transfer from my camera. Using that cable solved all the problems. Most likely some kind of interference was occurring and causing signal iss… > [@Lightburn not connect with my laser](https://forum.lightburnsoftware.com/t/lightburn-not-connect-with-my-laser/191613/21): > > Thank you Mike for all the help, that was the problem, I replaced the USB cable with a new one and it took care of my problem. Thank you, John J Also, unless you have a compelling reason to cut the outside (red) lines first, doing the inside (green) lines first will preserve their alignment: when the red piece gets free, it will almost certainly be misaligned for the green cut. --- _[View the full topic](https://forum.lightburnsoftware.com/t/missing-some-complete-closed-profiles/192363)._