AccessWidenerFormatException - please help | The Fabric Project | Page 1

winter storm Jun 25, 2025, 4:58 AM

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Hi - I've been tearing my hair out on this. I've created a simple mod for tin ore, that works fine and adds the expecting blocks and items and recipies. Now I want to create another mod that uses the tin mod. eg: references blocks/items. I've added the relevant things to settings.gradle and build.gradle. Everything compiles correctly, but when I try to do datagen, I get an access widener issue.

Caused by: net.fabricmc.loader.impl.lib.accesswidener.AccessWidenerFormatException: Namespace (intermediary) does not match current runtime namespace (named)

I've no idea where to make this change or why it is needed. The code being accessed as far as I can tell is all public.

Note: I also get an error when running the genSources task, based on an implicit dependency, but I don't think that is causing the problem, but just incase...

Thanks you in advance for any advice.

winter storm Jun 25, 2025, 8:44 PM

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AccessWidenerFormatException - please help

clear nexus Jun 26, 2025, 12:04 AM

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is there any need for an accesswidener file?

winter storm Jun 26, 2025, 12:05 AM

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Possibly, but I don't know anything about that. I do know that the classes/items I'm referring to are declared as public.

winter storm Jun 26, 2025, 12:20 AM

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FYI - I've worked around the issue, instead of including the tin project, I'm just depending on the jar and this seems to work fine, but it does mean I need to manually update the jar when tin changes.

dapper owl Jun 26, 2025, 2:28 AM

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winter storm Hi - I've been tearing my hair out on this. I've created a simple mod for tin or...

You shouldn't use access wideners unless absolutely necessary, anyway.

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For most cases an Accessor/Invoker works fine

#AccessWidenerFormatException - please help