[MCL-8363] Minecraft Crash Incremental CMS Could Not Find Class

I have searched the problem online. Each suggestion is out of date and did not work. When I sign into Minecraft and press Play, the game immediately crashes and a message appears saying:

Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
Error: Could not find or load main class net.minecraft.launchwrapper.Launch

I play on Minecraft 1.12 and my Minecraft is modded. I removed all the mods and the problem persisted. I use Forge mod loader and when I used a non forge account, the problem still came up. I tried playing online and then offline and both don't work. I have tried switching Java from 8 to 7 and this doesn't work either.

Linked issues

duplicates 1

MCL-8361 Launcher 2.0.955 not loading non-vanilla profiles. Resolved

Comments 23

migrated 2017-10-25T16:16:53Z

Same issue persists on Linux after an hour of the windows version being fixed. Launcher version 1.6.82-j, I am unable to load anything vanilla or modded, with the exception of the latest snapshot they released this morning. somehow, that loads fine.

migrated 2017-10-25T16:19:07Z

Same for me

migrated 2017-10-25T16:25:16Z

Same for me!

migrated 2017-10-25T16:27:38Z

Same for everyone :'(

migrated 2017-10-25T16:30:21Z

The same thing has happened to me, i tried changing java versions, and changing between minecraft versions. Nothing works.

13 more comments

migrated 2017-10-25T16:31:59Z

Dylan Henry, as Ryan Lawton said you can try the newest snapshot, that works!

migrated 2017-10-25T16:33:48Z

@Domenico: that doesn't help. I personally run a pair of MC 1.7.10 servers i cant log into now. Many people play 1.10.2 modpacks, etc. latest snapshot is good to see some pretty new changes, but useless for anything else.

migrated 2017-10-25T16:35:11Z

@Ryan that's a problem for me too! I wanted to upload a map today and fix some bugs but I can't since I don't want to risk loading it on a snapshot

migrated 2017-10-25T16:35:55Z

Domenico Rotolo, Yes thats the only thing that works... but whats the point, i cant play with anyone... Lol

migrated 2017-10-25T16:47:10Z

The snapshot sounded like a good idea. I went on and it loaded for a minute and then went right back to the error.

migrated 2017-10-25T16:48:29Z

Hunter Micael Graham, Are you using the latest snapshot?

migrated 2017-10-25T16:58:13Z

I was originally using 1.12 with Forge then 1.12 alone but then when I saw people were saying the snapshot worked I tried using snapshot 17w43a and it did not work. It showed the same message that it showed on the others.

migrated 2017-10-25T17:00:10Z

This is just getting annoying... I sure hope they fix this, and soon. i was gonna build on my server today and now i can't.

migrated 2017-10-25T17:00:19Z

Strange, it works for me!

migrated 2017-10-25T17:20:42Z

Also @hunter michael graham: to fix incremental cms depreciated, in your launcher profile under JVM arguments, remove the "-XX:CMSIncremental" option

migrated 2017-10-25T17:33:15Z

Thanks, that fixed half of the bug! Now the message is only this: Error: Could not find or load main class net.minecraft.launchwrapper.Launch

bemoty 2017-10-25T17:36:37Z

Thank you for your report!
However, this issue is a Duplicate of MCL-8361.

If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki

migrated 2017-10-25T17:39:53Z

@Bemoty: 8361 does not show up in my bug list, and is also unassigned and unresolved.

https://puu.sh/y6X5K/d6be2af108.png

bemoty 2017-10-25T17:42:29Z

@unknown Not sure why it doesn't show up for you in the list, but if you want to see the report, click here: MCL-8361.

Also, yes, it is still unresolved as it is unknown if this bug is actually fixed for everyone.

migrated 2017-10-25T17:46:11Z

Bemoty

The bug was fixed in windows in under 20 minutes, courtesy of Microsoft and Mojang. bug 8361 specifics the windows version of the launcher. Bug 8363 lists the MAC version as still broken, and I can confirm I am on linux, also still broken and pending update. this is now more than two hours after the windows version has been fixed, and nobody else.

migrated 2017-10-25T17:52:36Z

I'm on windows and it's still broken :l

migrated 2017-10-25T22:13:10Z

How do I fix the "Error: Could not find or load main class net.minecraft.launchwrapper.Launch" problem?

migrated 2017-10-26T15:54:39Z

Update: I replaced my mods folder with a new folder. I took all my mods out of mine craft. Loaded it and it loaded fine. I then made a new folder on my home screen and named it Mods and added all my mods to this folder and replaced the original mods folder with the new one. Now my Minecraft is working with both forge and mods.