4.8 crash when dragging blueprints into a level or loading a level

Hey Epic,

Experiencing a crash after migrating a copy of my project from 4.7.6 to 4.8 Preview 4. When I drag certain blueprints into my level or load them with ones containing them (which is usually all of them) it hangs for a bit then crashes.

It does not matter if I use 4.8 from Binary (launcher), Source from Github or even the Promoted build from Github, I experience this crash.

I seemed to have narrowed this down to blueprints that contain a high amount of components inside of them. Smaller, more modular blueprints when dragged actually work.

I’ll attach the of the two blueprints they crash for (they are different in the contents) and DxDiag and Unreal Editor Log.

[Crash & DxDiag][1]

45873-unreallogs.zip (22.3 KB)

If you guys would like me to try and recreate this in a new sample project and send it up I can try and do that as well. (Or alternatively, just send a reduced version of my project with the files)

Hey

Thank you for providing this information to us. It would be extremely helpful if you were able to test this out on a brand new project, to see if it only happens on older projects or not. I have migrated over folders from older versions of the engine to a project I updated to 4.8.0 and I have not ran into this issue yet, so I’d love to be able to pin down a proper reproduction for this issue you’re running in to.

Have you tested this in 4.8.0, not the preview version of 4.8?

If at all possible, could you please zip the assets that you’re experiencing the trouble with so that we can test them here in house? If you do not want them to be released to the public, feel free to provide the link to me in a private message on the forums.

Looking forward to hearing from you, thanks!

Hey ,

Unfortunately, the issue still persists in 4.8 (did not know it was released today, looks great!)

Since the assets used in the blueprints were only two unique static meshes, I created a blank project and just only inserted blueprints from my project and the anything attached to those.

[Zip of the blank project][1]

45934-myproject.zip (589 KB)

I’ll still try reproducing with a new blueprint, but hopefully this provides the information you’re looking for.

Thanks for your help so far.

Hey,

Does your project blueprints have any ‘cast to’ scripts within them? That’s part of the error I’m getting, but I can’t even open the blueprint to investigate this issue further. Are you able to open the blueprint editor at all?

Thanks!

Hey ,

There are no nodes in this blueprint, I’m using them as sort of a “prefab” or a pre-made group of objects. You should be able to take those assets into 4.7.6 and actually be able to open those two blueprints.

To answer your questions, I’m not able to open the blueprint editor in 4.8, but I can in 4.7.6.

Is there a possibility I may have to remake these blueprints for my project?

To recap: No Cast’s, not able to open them.

Thanks!

Hey

I have looked over the crash report that this project is providing and looking over the , it seems that the blueprint can’t find any of the cubes. Typically when you want to build something out of cubes, you’d want to do that in Maya, 3DSMax or some other 3D modeling program. That way, you can import it in and then create a blueprint to reference it if needed.

Here is just a small portion of the errors thrown out from your project when it’s in 4.8:

[2015.06.11-16.17.03:192][846]LogLinker:Warning: Asset '../../../Engine/Content/ArtTools/RenderToTexture/Enums/RenderToTexture_Enum.uasset' has been saved with empty engine version. The asset will be loaded but may be incompatible.
[2015.06.11-16.17.07:373][145]LogLinker:Warning: Can't find file '/Game/materials/cubic/colors/orange'
[2015.06.11-16.17.07:373][145]LogLinker:Warning: Can't find file for asset '/Game/materials/cubic/colors/orange' while loading C:/Users/./Downloads/45934-myproject/MyProject/Content/SpawnRoom.uasset.
[2015.06.11-16.17.07:373][145]LoadErrors:Error: Error /Game/SpawnRoom : Can't find file for asset. /Game/materials/cubic/colors/orange
[2015.06.11-16.17.07:373][145]LogLinker:Warning: Can't find file '/Game/materials/cubic/colors/red'
[2015.06.11-16.17.07:374][145]LogLinker:Warning: Can't find file for asset '/Game/materials/cubic/colors/red' while loading C:/Users/./Downloads/45934-myproject/MyProject/Content/SpawnRoom.uasset.
[2015.06.11-16.17.07:374][145]LoadErrors:Error: Error /Game/SpawnRoom : Can't find file for asset. /Game/materials/cubic/colors/red

It continues on for quite a while, due to the number of cubes you had within the blueprints. I would highly suggest recreating your project and creating those hallways and rooms within a 3D modeling software.

If you have any further questions, please let us know. Have a great day. :slight_smile: