Bug Report

Invar can't be pressed in a metal press (Immersive Engineering). Placing it onto the conveyors will not pick it up.

Trying to melt Invar in a smeltery looks like it's going to work for a second then it turns into grey bars and is unable to smelt.

Expected Behaviour

Being able to make Invar Plates/Rods.

Steps to Reproduce (for bugs)

1. Try to smelt / press.

Client Information

• Modpack Version: 3.1.1
• Java Version: 1.8.0_51 64bit
• Launcher Used: Twitch Launcher -> Default Minecraft Launcher
• Memory Allocated: 8gb
• Server/LAN/Single Player: Server
• Optifine Installed: No
• Shaders Enabled: No

World Information

• Modpack Version world created in: 3.0.8

You know what, I think it's anything that's related to ContentTweaker.

Ore generation that's ContentTweaker related - broken.
Plates/Rods related to ContentTweaker related - broken.
Spawning in and breaking Interium Ore - gives Osmium Chunks - broken.
Hammering stone on a stone anvil to make stone nuggets - gives Redstone Alloy Plates - broken.

Possibly because you're using an outdated Java version. Install the latest (202 atm), then go into the Twitch Minecraft settings and tell it to use the JAR launcher instead of native.

Though I'm not sure it's related to the version of Java, I'd suggest using the JAR launcher instead and using a newer version of Java. That version is years old at this point and I believe caused issues with Immersive Engineering.

I am not able to reproduce this issue. This as of now appears to be an error by users when updating their packs.

I'd recommending including your crafttweaker.log located at the root of your Minecraft instance to see if there are any issues mentioned in there.

You're running two different versions of Java between your server and client released years apart and you expect mod developers to ensure compatibility with both? That's not a realistic demand.

It's widely accepted that mods will target later versions of java which are more stable, have fewer bugs and are more secure.

Speaking of which: https://www.cvedetails.com/vulnerability-list/vendor_id-93/product_id-19117/version_id-186810/Oracle-JRE-1.8.0.html

I'm personally not a fan of running software on my computer with numerous known and easily exploited vulnerabilities that offer a remote attacker complete access to my system.

Further, the jar launcher Twitch uses is Mojang's own previous launcher. Not to mention, if you're wedded to the native launcher it is possible to change the version of Java it launches. Just with how it's set up in Twitch you need to do it every time you start the launcher.

My suggestion for fixing your issue is set everything up from scratch. Install the modpack fresh on your server, redownload the client. Test in a fresh world on your server to see if the issue is present there.

If all goes well, copy your old world back onto the server.

If things break when you put your old world on, try putting your backup from 3.0.8 on and seeing if something went awry in the conversion.

Sorry I've been busy the last few days so I wasn't able to update this issue.

The server is running on Java(TM) SE Runtime Environment (build 1.8.0_201-b09), I don't believe I've set things up to use the jdk.

CraftTweaker logs: https://gist.githubusercontent.com/ZeekDaGeek/81afea823e6cdabbfd684fefa3a425cc/raw/f47aa99cf5bd4e71304582f0f35d03f773bb8624/gistfile1.txt

I've searched through for ERROR and wasn't able to find it, searching for specifically Ivar doesn't show anything that's very abnormal...

The only mod extra I have is a Whitelister...

Also Mojang officially suggests that everyone should use their default launcher to launch Minecraft. The Minecraft launcher downloads and manages it's own Java version. All mods should be developing around 1.8.0_51, the alternative is putting your passwords into random programs and hoping that they don't compromise your account, which I'm personally just not a fan of.