Crashes w/ Building Gadgets + Inventory Cables

[nikkisaurus]

Modpack ATM10 TTS, version 1.8
SFM version 4.28
Single player server

I'm not sure if this is more relevant to Building Gadgets or SFM, but when using the Exchanging Gadget to exchange blocks for inventory cables in a large factory, I'm experiencing crashes where I cannot get back into the game. I've noticed if I use the gadget for only a couple of blocks at a time, it is fine. I experienced the crash a couple times. The first time I was replacing maybe 9 blocks at a time, and the second I might have done 15.

I don't understand how to read crash logs and whatnot, but through ChatGPT, I was able to identify a particular block the first time causing the issue. I had to remove all of the FTB mods from my install, which allowed me to login, then remove the block (in the first case it was a MI Polarizer). I then logged out and added the FTB mods back, logged back in and was able to replace the block and play as normal. Through the troubleshooting I had tried multiple things like updating mods within the pack and repairing the profile, so I'm not sure if some weird combination of that came into play, but it seems like this was the main thing that did it.

Now, for a little bit I learned my lesson and didn't use my gadgets for large replacements, but after doing some other stuff and cleaning up some lag in a different area, I got a bit cocky and went in again with it. This time, ChatGPT kept identifying multiple blocks, which I'd remove, then it would just identify another. Eventually I removed my whole factory and program (via the above process of first removing FTB mods to log in), which seemed to work. However, when I replaced the factory with the FTB mods reinstalled, it crashed again.

I did test logging in and rebuilding the cable network, as well as removing only the programming disk, but that made no difference. Only removing the factory helped. That being said, I'm not really sure what the core problem is. Here are my guesses:

• problem with Building Gadgets + SFM
• problem with something with FTB
• cable network is too large
• poorly optimized program
• a combination of the above?

The following files are: the exterior and interior of the large factory, and the placement of the factory block (was sitting on top of the redstone clock below the energy cube), the program for the factory, and the last crash log (after removing only the program but not the factory).

[MI Factory.txt](https://github.com/user-attachments/files/24384645/MI.Factory.txt) [crash_assistant_app_2025-12-30_09-48-14.log.gz](https://github.com/user-attachments/files/24384662/crash_assistant_app_2025-12-30_09-48-14.log.gz)

My next test was to see if removing excess inventory cables helped (since I was trying to even them up in case I wanted to add more later), so I removed any cables that weren't necessary for what was currently connected to my factory. This still resulted in a crash:

ATM10 To the Sky - 1.8 crashed. The logs have been uploaded to mclo.gs:

latest.log | debug.log head / tail (~28k lines) | crash-2025-12-30_10.03.57-server.txt | KubeJS: client.log / server.log / startup.log | crash_assistant_app.log | modlist.txt | CurseForge: skip launcher

Found �[2;34m1�[0m log analysis results:
�[2;34mCodexMessage�[0m in: crash-2025-12-30_10.03.57-server.txt

Mod list changes on top of the modpack:

Added mods:
�[2;32mcable_facades-1.21.1-NeoForge-1.6.4.jar�[0m
�[2;32mNumbered Hotbar-07.zip (resourcepack)�[0m
�[2;32mSuper RPG Font.zip (resourcepack)�[0m

And the last test, I created a new factory block, but it didn't help.

Some last minute thoughts I have to add:

• The factory block worked just fine until exchanging some cobblestone with inventory blocks to expand the cable network, but reducing to that prior network doesn't help. It seems like something was corrupted and saved into the network when this happened.
• There is another factory/network above this factory, in the same chunk. I'm not sure if that would be relevant (like too much going on in one chunk). It spans basically as far as this factory does, but there's nowhere near as much going on. All it does is provide fuel to Extreme Reactors (2 9x9x20 reactors and 1 9x9x20 turbine all reinforced) and handle lithium production between about maybe 12 thermal evaporation plants.

Also, I apologize if the main issue is within Building Gadgets, FTB, or ATM10 TTS; just let me know if this is something that needs reported to any of them as well/instead. Thanks!

As of now, I think my factory is unable to be saved. My best solution was to pick a recent backup, and I'll likely not expand my factory until I'm more sure of the issue (because frankly it's a lot of work debugging these crashes since it takes so long for the modpack to load up every time I wanna check something). I'm just gonna let it gather what resources it can for the time being and work on another mod within the pack until I'm sure it's safe to continue my MI stuff.

[nikkisaurus]

Okay, so it's super hard for me to quit certain habits, like using my building gadgets. I was working on a completely different factory this morning and accidentally ultimined a large section of inventory cables, so I whipped out my gadget and proceeded to corrupt my world again.

This time, I came up with a system to fix everything without much time or loss.

1. Log out, delete all the FTB mods so I can log back in.
2. Log in, remove every single inventory cable and the factory that caused the issue.
3. Log out, replace FTB mods.
4. Log back in, manually replace every inventory cable and factory that was removed.

Log out and back in to test to make sure it's good; so far it seemed to fix the issue. Granted, I only logged out once after replacing it, but I don't see it being a problem anymore. Not sure if this info helps diagnostics at all, but maybe if someone else has this issue, it'll help them easily restore their world. I also increased my backups to be more frequent because it seems to easy for me to keep making this mistake.

[TeamDman]

For now I've kicked this over to the Modern Industrialization team since the stack trace indicates that MI is crashing due to calling a ftb quests integration that uses a client side method on the server.

AztechMC/Modern-Industrialization#1241

My hypothesis is that the building gadget is manipulating the modern industrialization machines in a way that leaves them in an incorrect state that results in the next time they are ticked on the server a bad code path is followed leading to the calling of a ftb quests code on the server that should be client only.

So something like

building gadget -> changes MI machine -> SFM moves items around involving the MI machine -> MI machine ticks -> MI machine calls ftb quests helper -> ftb quests helper calls client method -> client method called on server results in a crash

[nikkisaurus]

I'm wondering if it may be worth posting to FTB? Because when I had the issue again the following day, it was for a Mekanism factory. So that makes me think it's the FTB quests issue rather than the machines itself? Plus removing those mods is what fixed it.

[desht]

@TeamDman this is indeed an issue with FTB Filter System (also affecting FTB XMod Compat & FTB Quests). Feel free to close this one, I'll follow up in the FTB issue.