# Intended compatibility of files contents while transition from 2.79->2.80->2.81

I am working on a file, which is not my own and therefore cannot be posted -- and it is a really complicated one. This file, when loaded into Blender 2.81 crashes blender sooner or later. I inspected the crash-files and enabled debug mode and found some hints here and there. I want to recreate the problem with a newly created file, which I can post. But before reporting, I want to make sure, that I am not reporting something, which cannot work. The file was initially created with Blender 2.79 and still works with Blender 2.80. Loaded into Blender 2.81 it crashes Blender after a short time or freezes it. What kind of compatibility is intended between these three versions of Blender? (I know, that 2.81 is in its early stage... )

• 2.81 is the current "stable" release, however Windows users have had some performance issues. Which OS is this happening on?
– Moog
Nov 26, 2019 at 17:44

• @mcc You may find a hint in the most basic log file (--debug), e.g. when there is a particular context where the crash occurs or when there are warnings. If it's completely unclear then create a copy of the project and delete objects etc. one by one and check if the crash still occurs. You don't have to find the source of the bug yourself, just a minimal blend file that causes the crash. The best approach would be to generate a stack trace using a debug build, however that require compiling Blender and setting up a debugger. Both needs some experience with software development. Sep 3, 2019 at 19:04