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Minecraft Version

1.12.2

Forge Version

14.23.2.2611

Mod Version

1.12.2-0.4.1-142

Describe your problem, including steps to reproduce it

On a multiplayer server, placing a basic pipe corrupted the chunk (it was backed up 20m before, so luck on that one.) and in both single player and multiplayer, it crashes the client.

https://pastebin.com/yH1U3t4i

Any other comments?

zip for custom mod pack on Twitch: https://goo.gl/UNW275

Did you enable Mcmp2 in the mod config? It's disabled by default for a reason (it doesn't work)...

Ok, I found it, and it seems that was the problem, thank you. I don't even remember turning it on, but it's fixed now.