# Error, potential bug? **URL:** \ **Category:** Questions\ **Created:** [April 9, 2026, 11:44pm UTC](https://forum.defold.com/t/error-potential-bug/82630 "2026-04-09T23:44:35Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![britzl](https://forum-defold.b-cdn.net/user_avatar/forum.defold.com/britzl/32/23_2.png) [@britzl](https://forum.defold.com/u/britzl)\ **Post date:** [July 24, 2026, 7:00am UTC](https://forum.defold.com/t/error-potential-bug/82630/5 "2026-07-24T07:00:35Z")
Can you share the project with me? (bjorn@defold.se) > [@Jay\_Cee](#): > > I also receive an error for this code. it seems `frame_start` and `frame_end` no longer exist? Yes, this was changed as the original with frame\_start and frame\_end only works in simple atlas cases when animations are ordered in a sequential list of frames. This is usually not the case. > [@Defold 1.12.3 BETA](https://forum.defold.com/t/defold-1-12-3-beta/82543#p-198616-important-note-about-changes-to-resourceget_atlas-and-resourceset_atlas-4): > > Defold 1.12.3 Beta Disclaimer This is a BETA release, and it might have issues that could potentially be disruptive for you and your teams workflow. Use with caution. Use of source control for your projects is strongly recommended. Access to the beta Download the editor or bob.jar from GitHub: [Release v1.12.3 - beta · defold/defold · GitHub](https://github.com/defold/defold/releases/tag/1.12.3-beta)warning Important note about changes to resource.get\_atlas() and resource.set\_atlas() If you manipulate or query an atlas at runtime using resource.get\_a… --- _[View the full topic](https://forum.defold.com/t/error-potential-bug/82630)._