MC-121280

I can't get back to 1.12 or 1.12.2 after opening 17w43a

Resolved

Invalid

After opening Minecraft in 17w43a and quitting, I can't reopen Minecraft in 1.12 because:

Erreur : impossible de trouver ou charger la classe principale net.minecraft.client.main.Main
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release

Comments 1

null 2017-10-25T15:22:15Z

Downgrading is not supported. Please run your snapshots in a different save directory.

Reporter: Aeldrion

Assignee: (Unassigned)

Created: 2017-10-25T15:17:55Z

Updated: 2025-03-16T00:26:27Z

Resolved: 2017-10-25T15:22:15Z

ADO:

Confirmation Status: Unconfirmed

Area:

Mojang Priority:

Category:

Labels:

Affects Versions: Minecraft 17w43a

Fix Versions:

Retrieved 2025-09-14T06:40:35Z