Topic category: Troubleshooting, bugs, and solutions
Hello,
Seems this is my week for comming accross issues. I am currently writing a mod using MCreator started is in MCreator 2024.4, Migrated to 2025.1 all was working fine. I exported the mod and with my retail version of minecraft (Not builtin Mcreator) I have been testing and all has been working fine no issues. I use a number of other mods and every so often I export the mod as it is updated. Since my export in the latest MCreator 2025.2 I could not get the mod work. If I use a version compiled in the previous 2025.1 vesion no issues. I have manage to narrow it down to Optifine. as soon as that is remove all is ok. I need optifine as it is required by a few of the other mods and also the shader I use.
Could someone tell me if this is indeed a bug or if I have done something wrong. as I mentiooned I have done thourough testing. I am using MineCraft 1.20.1 Forge as this still seems to have the most support for addons i require for my builds. The Mod I am creating is just simple Blocks custom for builds I cant find else where ancient civilization & culture items purely ofr creative mode that use 32x32 or 64x64 textures. The testing i have done is that i also reinstalled MCreator 2024.1 compiled the last version of my mod created in there and tested all ok, the i have reinstalled mcreator 2025.2 compiled exactly the same mod after MCreator as updated it itself made not adjustments or added anything just recomplied it works oki as soon as optifine is added crashes i have done this with only optinfine installed no other mods shader or resourcepacks just my mod and the optifie.
Any halep that be give would be greatly appreciated. ty.
Any crash logs? 1.20.1 plugin, right?
The crash report can be found here Crash_Report_Link
I tried pasting as code I couldnt get the post to submit.
The crash report is from this evening as I have tried it again with both versions of MCreator.
exported the mod with 1 block and its texture, from version 2025.1 and only optifine installed in minecraft 1.20.1 forge is OptiFine 1.20.1_HD_U-I6.jar (MOD File) all other mods resources shaders are reall works fine
export the same mod after importing it into 2025.2 or even creating a new one from scratch tha same 1 block and its textre and replace the mod file so using exact same minecraft install, same optifine mod minecreaft crashes at loading mods the mod unable to be loaded is my MCreator one.
Kind Regards.
This seems like a bug of Minecraft Forge if you use 47.4.x
From https://forums.minecraftforge.net/topic/154387-forge-474-minecraft-1201/, it supports those methods that are not found.
Either Optifine or Minecraft Forge revert those methods
See
i'll check that a little later, thnkyou fopr the info update
I have had a look, its all a little beyond my capabilties I think. I can only do basic things thats why I was trying out MCreator to make some Blocks that I need that I add just to the cerative mode of mineCraft.
The basic thing I got I think is that the forversion is doing something. SO I have tried various instalations of forge from version 47.3.0 all the way to 47.4.3 all result in the same optifine works great with my mcreator mod as mentioned it contains 1 block one item for the one creative tab so i can acceees the block in game. as long as I compile the MCreator mod is version 2025.1 all works fine with all the versions of forge I have tried. Compile exactly the same mod in mcreator 2025.2 1st release or updated one mine refuses to load my mcreator mod and crashes to deskyop again with all the same version of forge tried. I really have no idea what I should do next. Any help is greatfully appreciated. If no fix can be found Ill just use MCreator 2025.1 to make the things I need. Again tankyou for such speedy replies.
It should work with 47.4.0, otherwise a bug report may need to be issued to either Forge or Optifine
Version 47.4.0 was the version installed I updated forge when the MCreator Plugin 1.0.1 was updated to that version so that my minecraft and MCretor was on same version. Thats version I reinstalled after all testing last night. I get exactly the same issue the MCreator MOD I have made when compiled in the 2025.2 or it updated version and the the +mc1.20.1 plugin version 2.0.0 or 2.01 still crashes.
More information that migh be of use.
I also did some extensive testing, when I began with minecraft I had over 60 mods installed aswell as numerous plugins. I did a version for testing with 60 mods installed (NO Optifine) and 5 or so resource packs. My Mod will work fine if complied in MCreator versions 2025.1 - to tha lates 2025.2 update. as soon as Optifine is added the game refused to load the mod always causing intial error on the mine creaft screen is mine say unable to load mod. As previousley stated all versions of MCreator & the 1.20.1 Plugin all work fine untill optifine in used. This was also tested with just my mod created with MCreator using the 1 block & its custom texture. everything works fine on all versions but I can not in anyway use Optifine required for the solas shader I use, (Shader has not been installed during testing nor have any resource packs). as soon as i try to use MCreator version 2025.2 or any updated version of it for compling the same 1 block and its custom texture minecraft just refuses to load.
I know this is a long repley I do apologise, I struggle with reading and writing and explaining things. I have tried to put all the information that might be of help to resolve this issue. I have now reverted to the 2025.1 last updated version as that is working fine with Optifne installed with minecraft client and for now at least does what I need.
Again I would like to take the time and oppotuniy to thank you kindly for all the information you have supplied in trying to resolve this issue.
Kind reagrds
Thanks for the research.
Seems like optifine removes this method from Forge 47.4.0. You may need to report this bug to the optifine devs