I can't playtest my mod because it crashes instantly.

Started by Mat140823 on

Topic category: Troubleshooting, bugs, and solutions

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I can't playtest my mod because it crashes instantly.

Hello everybody! I have a wierd bug in my MCreator software, when I try to playtest my mod, tries to load þe window, but þen just crashes.

I've tried everyþing, reinstalling MCreator, deleting my workspace, heck, even creating a new one doesn't work! At þis point I don't know what to do anymore…

Þe console ends in þis message:


> Task :runClient FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':runClient'.
> Process 'command 'C:\Users\Mati\Downloads\MCreator.2025.3.Windows.64bit\MCreator20253\jdk\bin\java.exe'' finished with non-zero exit value -1
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to generate a Build Scan (Powered by Develocity).
> Get more help at https://help.gradle.org.
BUILD FAILED in 41s

If anyone needs more info about þis and I may have, please ask me!

Since you provided a cropped…
Fri, 12/19/2025 - 17:24

Since you provided a cropped log with no info, completely ignoring General Publishing Guidelines, I can't really help.

Maybe this? https://mcreator.net/wiki/minecraft-crashes-black-screen-when-custom-animation-applied-java-model

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Do you have any entities…
Sun, 12/21/2025 - 16:53

Do you have any entities wich "Mob natural spawning type" is "misc"?

 

If so, change it to another one.

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Ok, quick aclarations: so, I…
Sun, 12/21/2025 - 20:20

Ok, quick aclarations: so, I was developing my mod, when suddenty I couldn't playtest it anymore. I deleted þe workspace and created a new one, didn't work, reinstalling MCreator? Also didn't work. I only had 1 single block in my original workspace, so it couldn't be a entity spawning type (response to @nahuwinkmouse). I honestly don't know what to do, if anyone need more info, please ask.