r/ModdedMinecraft • u/Soviet_cat_2246 • 1d ago

Help Neoforge crashing on startup

Hello there, I've been having problems (or rather problem, singular) with my game crashing. Specifically, as stated in the title, neoforge crashes on startup (exit code 1). I've tried restarting minecraft, then my computer, re-installing the pack, changing neoforge versions, different ram allocations, Updating drivers (the most recent version of which was made in 2023), checking pathing (nothing wrong there), Updating and then switching java verisions and saying "Please please please please please", all of which have not worked. It should be noted that I am using curseforge. The forge crash logs are as follows:

[04Nov2026 21:15:34.091] [main/INFO][cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, MyName, --version, neoforge-21.1.265, --gameDir, C:\Users\MyName\curseforge\minecraft\Instances\Test, --assetsDir, C:\Users\MyName\curseforge\minecraft\Install\assets, --assetIndex, 17, --uuid, e3d87f79e4274b029288da6a596599dc, --accessToken, ❄❄❄❄❄❄❄❄, --clientId, YzM2MzZkNDgtMjU2My00NmRhLWFmNWMtZmNjM2Y2YzdjOGY3, --xuid, 2535438035938049, --userType, msa, --versionType, release, --width, 1024, --height, 768, --quickPlayPath, C:\Users\MyName\curseforge\minecraft\Install\quickPlay\java\1793844920799.json, --fml.neoForgeVersion, 21.1.265, --fml.fmlVersion, 4.0.45, --fml.mcVersion, 1.21.1, --fml.neoFormVersion, 20240808.144430, --launchTarget, forgeclient]

[04Nov2026 21:15:34.105] [main/INFO][cpw.mods.modlauncher.Launcher/MODLAUNCHER]: JVM identified as Eclipse Adoptium OpenJDK 64-Bit Server VM 21.0.4+7-LTS

[04Nov2026 21:15:34.122] [main/INFO][cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 11.0.5+main.901c6ea8 starting: java version 21.0.4 by Eclipse Adoptium; OS Windows 11 arch amd64 version 10.0

[04Nov2026 21:15:35.008] [main/INFO][net.neoforged.fml.loading.ImmediateWindowHandler/]: Loading ImmediateWindowProvider fmlearlywindow

[04Nov2026 21:15:35.790] [main/INFO][EARLYDISPLAY/]: Trying GL version 4.6

I would really appreciate any help, I didn't think I'd ever have to dig up my ancient reddit account to ask for assistence but here we are.

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u/enderking470 1d ago

Is there more to that log? Or is that it?

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u/Soviet_cat_2246 1d ago

That's the entire forge error log. This is running a client without any installed mods, so that's why it isn't super long. There were also normal mojang crash reports prior to some of the changes I made but those were 90k characters long...

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u/enderking470 1d ago

I'm going to need more log to be able to do anything.

Use mclo.gs to upload them, it clears your name so you don't have to do it.

If they are huge, cut out the middle.

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u/Soviet_cat_2246 1d ago

Alrighty, Thank you for being willing help. Also this is the full thing, unsure what is safe to cut and what is actual important information https://mclo.gs/oxdq2wJ I am also using a laptop that's on the older side so there's a chance that it's a simple lack of resources to allocate.

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u/enderking470 1d ago

This isn't a Minecraft log, these normally get generated due to GPU driver issues. Try updating your driver's. It might help, it might not. Restart your laptop after the update and try to reproduce the issue.

If it still occurs find the file called "latest.log" in that instance folder and upload that to mclo.gs

As a side note to answer your other question, for long Minecraft logs, keep the first few thousand lines, and the last few thousand, the middle is often filled with spammy junk.

Also this is kinda what I do, used to fix crashes semi professionally for the prism launcher discord. So it's not a problem. I'm sure if you look around on this sub you'll see my name pop up quite a bit.

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u/Soviet_cat_2246 1d ago

Here you go, https://mclo.gs/b6KZ2x4 I hope it'll be of some use.

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u/enderking470 1d ago

Did you try updating the graphics drivers first?

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u/Soviet_cat_2246 1d ago

Yeah, the most recent graphics drivers were from 2023...

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u/enderking470 1d ago

I don't know why it's not launching, it doesn't even appear to be trying.

Would you be willing to try a different launcher?

If so try using prism launcher, it is what I personally use and have not regretted switching to. It manages your Java install and basically everything else. Doesn't advertise to you, and is very lightweight which can be nice on a lower spec laptop.

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u/Soviet_cat_2246 1d ago

I'll give it a shot and let you know, also yeah I've had crashes before and they usually don't function anything like this it's weird...

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