Describe the bug

When the auto-updater zip is used to make a profile in MultiMC and launched, Minecraft runs normally with Fabric, but with no mods.

Expected behavior

Packwiz should run and install the modpack.

Observed/actual behavior

Packwiz does not run. I've also noticed that the:

PreLaunchCommand="$INST_JAVA" -jar packwiz-installer-bootstrap.jar https://raw.githubusercontent.com/Madis0/fabulously-optimized/main/Packwiz/1.17.1/pack.toml

line in the instance.cfg is removed when the instance is run. This could be what is causing this, but I'm not sure why it gets removed.

Steps To Reproduce

1. Made an instance in MultiMC using the auto-updater zip
2. Launched the instance
3. Minecraft runs normally with Fabric, but with no mods

Modpack version

2.2.0

Launcher

MultiMC

Install method

Fresh install/new profile

Additional context

Previous versions of the auto-updater work just fine.

If you go into Edit instance > Settings > Custom commands, then paste "$INST_JAVA" -jar packwiz-installer-bootstrap.jar https://raw.githubusercontent.com/Madis0/fabulously-optimized/main/Packwiz/1.17.1/pack.toml into Pre-launch command, does it work?

If you go into Edit instance > Settings > Custom commands, then paste "$INST_JAVA" -jar packwiz-installer-bootstrap.jar https://raw.githubusercontent.com/Madis0/fabulously-optimized/main/Packwiz/1.17.1/pack.toml into Pre-launch command, does it work?

Thank you, your solution worked! Now, I'm wondering why the Pre-launch command isn't set, even though its in the instance.cfg? Or am I missing something?

🤔 That's strange. If it's defined in instance.cfg it should work, it might've just not properly loaded that time. When you were experiencing this issue, did you try restarting MultiMC at all? Did it persist?

I've already tried restarting MultiMC multiple times and it hasn't worked, although I am on the MultiMC development update channel. I'll see if switching to stable does anything.

Switching to the stable channel didn't make a difference. I also noticed that if you go to Edit Instance then close the window that pops up, the pre-launch line in instance.cfg disappears, if that is useful information.

Ugh, it might be that JVM args conflict with the pre-launch commands.
This version should work: https://github.com/Madis0/fabulously-optimized/releases/download/v2.1.0/Fabulously.Optimized.MultiMC.auto-update.zip
I'll revert it in the readme and investigate more.

The issue has been fixed and it has been reuploaded to https://github.com/Madis0/fabulously-optimized/releases/download/v2.2.0/Fabulously.Optimized.MultiMC.auto-update.1.17.1.zip
Sorry for the inconvenience.