Context

Hello!
I decided to try to create an assembly on version 1.20.1 exclusively with the Create mod and a couple more mods for it.

• if only mod "create-1.20.1-6.0.7.jar " - the game is starting;
• if I add a mod "createaddition-1.20.1-1.3.2.jar " - the game is starting;
• if I add your mod to the listed 2 mods "Steam_Rails-1.6.7+forge-mc1.20.1.jar " - the game closes without creating a crash file.

I am attaching all 3 log files.

2025-10-31-1-Create_only.log
2025-10-31-2-Create+Create Crafts & Additions.log
latest-Create+Create Crafts & Additions+Create_Steam 'n' Rails.log

I hope this helps in identifying errors in your mod (if possible).

Thanks!

Crash Report

no file

Got the same issue. Also for create version 6.0.8
CHATGPT DOWN HERE:
Yeah, that popup is just the top of the stack trace. The real problem is still the same one from your log: Steam ’n Rails (Steam_Rails-1.6.13-alpha) is crashing Create’s mixins.
From the log you uploaded:

• You’re on Create 6.0.8.

• Steam ’n Rails is Steam_Rails-1.6.13-alpha forge-mc1.20.1.

• During startup you get:

  • railways-common.mixins.json:client.MixinTrackVisual ... super class 'dev.engine_room.flywheel.lib.visual.AbstractBlockEntityVisual' ... not found in the hierarchy of target class '...TrackVisual'
  • then
    Mixin ... [railways-common.mixins.json:client.MixinCarriageContraptionInstance] in config [railways-common.mixins.json] FAILED during APPLY
  • which bubbles up as
    org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered when Create registers its entity visuals.

So Create is just the victim here; the mixin coming from Steam_Rails / Railways is blowing up.

Steam n rails is only available for 6.0.7 for now, as its in the alpha fase so the devs are first removing the bugs and then they're going to update to the latest version at the time that it comes out of the alpha, afaik

Well... get the same main error with create version 6.0.7.
If there is a 6.0.7 version, where can i get it?

Got the same issue. Also for create version 6.0.8

CHATGPT DOWN HERE:

Yeah, that popup is just the top of the stack trace. The real problem is still the same one from your log: Steam ’n Rails (Steam_Rails-1.6.13-alpha) is crashing Create’s mixins.

From the log you uploaded:

• You’re on Create 6.0.8.

• Steam ’n Rails is Steam_Rails-1.6.13-alpha forge-mc1.20.1.

• During startup you get:

  • railways-common.mixins.json:client.MixinTrackVisual ... super class 'dev.engine_room.flywheel.lib.visual.AbstractBlockEntityVisual' ... not found in the hierarchy of target class '...TrackVisual'
  • then
    Mixin ... [railways-common.mixins.json:client.MixinCarriageContraptionInstance] in config [railways-common.mixins.json] FAILED during APPLY
  • which bubbles up as
    org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered when Create registers its entity visuals.

So Create is just the victim here; the mixin coming from Steam_Rails / Railways is blowing up.

Got the same issue. Also for create version 6.0.8

CHATGPT DOWN HERE:

Yeah, that popup is just the top of the stack trace. The real problem is still the same one from your log: Steam ’n Rails (Steam_Rails-1.6.13-alpha) is crashing Create’s mixins.

From the log you uploaded:

• You’re on Create 6.0.8.

• Steam ’n Rails is Steam_Rails-1.6.13-alpha forge-mc1.20.1.

• During startup you get:

  • railways-common.mixins.json:client.MixinTrackVisual ... super class 'dev.engine_room.flywheel.lib.visual.AbstractBlockEntityVisual' ... not found in the hierarchy of target class '...TrackVisual'
  • then
    Mixin ... [railways-common.mixins.json:client.MixinCarriageContraptionInstance] in config [railways-common.mixins.json] FAILED during APPLY
  • which bubbles up as
    org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered when Create registers its entity visuals.

So Create is just the victim here; the mixin coming from Steam_Rails / Railways is blowing up.

Steam n rails is only available for 6.0.7 for now, as its in the alpha fase so the devs are first removing the bugs and then they're going to update to the latest version at the time that it comes out of the alpha, afaik

Got the same issue. Also for create version 6.0.8
CHATGPT DOWN HERE:
Yeah, that popup is just the top of the stack trace. The real problem is still the same one from your log: Steam ’n Rails (Steam_Rails-1.6.13-alpha) is crashing Create’s mixins.
From the log you uploaded:

• You’re on Create 6.0.8.

• Steam ’n Rails is Steam_Rails-1.6.13-alpha forge-mc1.20.1.

• During startup you get:

  • railways-common.mixins.json:client.MixinTrackVisual ... super class 'dev.engine_room.flywheel.lib.visual.AbstractBlockEntityVisual' ... not found in the hierarchy of target class '...TrackVisual'
  • then
    Mixin ... [railways-common.mixins.json:client.MixinCarriageContraptionInstance] in config [railways-common.mixins.json] FAILED during APPLY
  • which bubbles up as
    org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered when Create registers its entity visuals.

So Create is just the victim here; the mixin coming from Steam_Rails / Railways is blowing up.

Steam n rails is only available for 6.0.7 for now, as its in the alpha fase so the devs are first removing the bugs and then they're going to update to the latest version at the time that it comes out of the alpha, afaik

Well... get the same main error with create version 6.0.7. If there is a 6.0.7 version, where can i get it?

Woops typo, 6.0.6, not 6.0.7

Got the same issue. Also for create version 6.0.8
CHATGPT DOWN HERE:
Yeah, that popup is just the top of the stack trace. The real problem is still the same one from your log: Steam ’n Rails (Steam_Rails-1.6.13-alpha) is crashing Create’s mixins.
From the log you uploaded:

• You’re on Create 6.0.8.

• Steam ’n Rails is Steam_Rails-1.6.13-alpha forge-mc1.20.1.

• During startup you get:

  • railways-common.mixins.json:client.MixinTrackVisual ... super class 'dev.engine_room.flywheel.lib.visual.AbstractBlockEntityVisual' ... not found in the hierarchy of target class '...TrackVisual'
  • then
    Mixin ... [railways-common.mixins.json:client.MixinCarriageContraptionInstance] in config [railways-common.mixins.json] FAILED during APPLY
  • which bubbles up as
    org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered when Create registers its entity visuals.

So Create is just the victim here; the mixin coming from Steam_Rails / Railways is blowing up.

Steam n rails is only available for 6.0.7 for now, as its in the alpha fase so the devs are first removing the bugs and then they're going to update to the latest version at the time that it comes out of the alpha, afaik

Well... get the same main error with create version 6.0.7. If there is a 6.0.7 version, where can i get it?

Woops typo, 6.0.6, not 6.0.7

Hmm, okay. Hope it gets updated soon. I want to use this mod, but also with Valkyrien Skies. They updated it to 6.0.7. Need more patience, I presume 😅

Context

Hello! I decided to try to create an assembly on version 1.20.1 exclusively with the Create mod and a couple more mods for it.

• if only mod "create-1.20.1-6.0.7.jar " - the game is starting;
• if I add a mod "createaddition-1.20.1-1.3.2.jar " - the game is starting;
• if I add your mod to the listed 2 mods "Steam_Rails-1.6.7+forge-mc1.20.1.jar " - the game closes without creating a crash file.

I am attaching all 3 log files.

2025-10-31-1-Create_only.log 2025-10-31-2-Create+Create Crafts & Additions.log latest-Create+Create Crafts & Additions+Create_Steam 'n' Rails.log

I hope this helps in identifying errors in your mod (if possible).

Thanks!

Crash Report

no file

To clarify, this mod is only for Create versions up to 6.0.6. If you use 6.0.7 or 6.0.8, it will crash.