Mcreator 1.9.0 "build failed"

Started by waterpeanut19 on Thu, 09/19/2019 - 21:58

Topic category: Bugs and solutions

Last seen on 00:11, 24. May 2020
Joined Aug 2019
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Mcreator 1.9.0 "build failed"
Thu, 09/19/2019 - 21:58

I encountered this error message when trying to build a mod:

Executing gradle command: build
Build info: MCreator 1.9.0, 64-bit, 18370 MB, Windows 10 - cmd, JVM 1.8.0_212, JAVA_HOME: X:\Pylo\jdk
C:\Users\Water\MCreatorWorkspaces\umacraft>gradlew"X:/Pylo/jdk" -Dorg.gradle.parallel=false -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" build 
Starting a Gradle Daemon, 7 incompatible and 1 stopped Daemons could not be reused, use --status for details
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'umacraft'.
> java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 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 get full insights.
* Get more help at
Task completed with return code 0 in 17024 milliseconds

The solution to this problem…
Fri, 09/20/2019 - 16:41

The solution to this problem and many other problems can be found in our knowledge base: Please check the knowledge base before opening a new topic on the issue which has a known fix.