Unable to start Unreal, stuck at 39%

[anonymous_user_93809561]

Same problem, stuck at 39%. I dont have raytracing enabled and I tried many fixes here. It was fixed instantly by one of these methods (not sure which):

“solution: grab every project that is stuck and remove its DerivedDataCache - Saved - config folder”

“You should try to rename the Config folder in the project to Config_old, it works for mine.”

[Jambax]

It’s only “Fixed” by deleting the config folder because you reverted back to default engine settings by doing that.

If you enable raytracing, ALL shaders have to be recompiled including engine shaders. Your project isn’t stuck, it’s compiling shaders. If you delete the config folder, then raytracing isn’t enabled, and you revert to the default shaders that have likely already been compiled and/or compile faster.

If you really want to see what’s happening, launch the engine with Visual Studio attached and it will dump shader compile messages to the output log.

[skittixch]

For what it’s worth, I got through this issue by allowing Unreal through my firewall

[DiamondNinjaUTub]

I had this same issue. Stuck at 39% and wouldn’t load up the project. Stupid me turned on Ray tracing for the project. So, I deleted the files for the Project and created a new Project without Ray Tracing on and the issues went away. Check if Ray Tracing is on and if so, turn it off cause it kills your CPU!

Specs:
AMD Radeon RX 580 (Doesn’t support RTX)
AMD Ryzen 3 3200g
16gb RAM
1TB HDD

[Liu_Libo]

Same for me UE4.25.4, but just close it,and delete PROJECT/Config/DefaultEngine.ini, then it’s solved for me.

[dip1207]

The problem may have been fixed at version 4.25.4. I have a weaker hardware than others have [core i5-8265U,8 GB RAM, MX150 2GB VRAM]. I may get stuck for 30 minutes to 1 hour at 39 % (with starter contents) or 45% (without starter contents) but it would load later.

[anonymous_user_4b7ffc3d1 (anonymous_user_4b7ffc3d)]

also iam stucked at 39%, ??

[_oodz0fnoodz (ツoodz0fnoodz)]

For me it’s when loading the ArchViz template with starter content and ray-tracing enabled, I get stuck at 39%. I was finally able to get it open by disabling ray-tracing, and letting the program sit. It appeared to get stuck at 39% again, and then jumped to 45% and got stuck. It finally moved it’s way to 100% and opened.

[Jambax]

@TheJamsh

It’s only “Fixed” by deleting the config folder because you reverted back to default engine settings by doing that.

If you enable raytracing, ALL shaders have to be recompiled including engine shaders. Your project isn’t stuck, it’s compiling shaders. If you delete the config folder, then raytracing isn’t enabled, and you revert to the default shaders that have likely already been compiled and/or compile faster.

If you really want to see what’s happening, launch the engine with Visual Studio attached and it will dump shader compile messages to the output log.

Quoting for visibility again.

[Sanjaidelta1]

Deleting "DerivedData Cache"folder and renaming config folder worked for me!!

[cdub84]

Hey guys had the same problem, turn off ray tracing and it worked right away. I’m running a GTX 1070 which should work, but it causes the bug.

[Virus_FusionYT]

I accidentally put raytracing on and did it with a non rtx supported gpu and it’s stuck on 39%. Can anyone help me?

[Weaver]

@anonymous_user_f2286cbd1

I have the same problem, but only when trying to create a new VR project. I can create non-VR projects in a few seconds. Anyone have any idea what the problem might be?

It’s cause the VR project uses the forward renderer. I can replicate this getting stuck at 39% behaviour simply by making a new empty project. switching it to forward render, and restarting the editor as prompted. For me it “only” gets stuck for around 20 minutes and it’s only the first time launching as it needs to recompute a massive pile of shaders. Then after it launches, it hilariously needs to recompile more shaders for another 20 minutes.

[CraigItsFriday]

If it’s a new project, delete the config folder. Worked perfectly after that.

[anonymous_user_dce139a6]

@High-Sodium

This 100% worked for me. Naming the Config folder to Config_old and relaunching fixed it. After running it again, I went back and deleted the new ‘Config’ folder it created and renamed my ‘Config_old’ back to Config and changed the line ‘r.AllowGlobalClipPlane=True’ to ‘false’ in Config\DefaultEngine.ini. Ran like a charm.

This was for converting an older version of a project.

This worked for me too. for the fix!

[Daniel_Bisar]

Version 4.26.1: Stuck very long at 39%. After reading a few posts here I had a look at the logs: You will find it under: ProjectFolder/Saved/Logs/
You should be able to open this file while unity is already loading. In my case I noticed: shader compilation messages. Since I enabled Raytracing just for fun it tried to compile > 1700 shader. Just disabled Raytracing and the editor opened quick and easy.

[ricardonr]

sorry guys, you can’t be serious…

1. gave the engine a try, installed, created an empty project with ray tracing, and opening it is stuck at 39% for I don’t know how long… discussions say because of some shaders(?) compilation I even don’t know about??? da heck? For gods sake give at leas out some info what is going on and progress!!
2. the design of the UI is really amateur, and stuck at least 10 years ago, and makes whole experience pain in the ■■■… same like blender - so much potential burried under tons of wrong decisions for UIX, one has to puke at the incredible-ridiculousness… The whole accumulated mess needs to be reorganized and UI redesigned so it can be really a tool what God intended for Universum 2.0
3. PLEASE include inline editor for meshes, in TOTALl sketchup style of work and render for quick dev - please don’t reinvent the wheel here!
4. Make the whole work mess much more optimized and less memory/processor hungry

[dh2k]

try to quit steamvr.

[cloudchops]

It just takes a long while to get past 39% sometimes, as others have said, be patient that’s all. I’ve waited over half an hour before and I’m sure others have waited longer. This usually happens on engine restart after enabling/disabling particular plugins or project settings, eg ray-tracing, clip planes etc. Saying that if it can be made quicker using some of the suggestions then even better.

[ste1199]

me to keep getting stuck on 39%. I have 20gb ram running at 1800mhz and my cpu amd fx 8350 8 core. graphics card titan x 12gb. I cant do anything can someone help I am supposed to be going to uni in September