[MC-97525] I change minecraft versions from 1.8 to 1.7 and when i load up a world in 1.7, it crashes.

I changed the minecraft version form 1.8 to 1.7 and when i loaded up a world in 1,7, it crashed

Environment

OS: Windows 10 (ver 10.0, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.51 (bootstrap 100)
Minecraft: 1.7.8 (updated Tue Feb 02 07:37:47 PST 2016)

Linked issues

duplicates 1

MC-38527 Crash after changing max view distance to 20 chunks in options.txt / Render distance too high in options.txt after downgrading Resolved

Comments 2

migrated 2016-02-18T23:53:25Z

That's because 1.8 worlds aren't compatible with 1.7. The same goes for other versions. 1.6 worlds won't work with 1.2, etc.

kumasasa 2016-02-19T06:42:56Z

Incomplete without a crash report from ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]). Please attach it to this ticket so that we can diagnose your issue.

Most likely a duplicate of MC-38527

Besides that: Your version of Minecraft is no longer supported. We are currently only accepting bugs found in the official release 1.8.9.