java[5301:299207] unrecognized type is 4294967295 and java[5301:299207] *** Assertion failure in -[NSEvent _initWithCGEvent:eventRef:]

[TianYong-Goh]

Hello,
does anyone know how to solve this error? It appears a few seconds after I run my Launcher. Everything works fine and I am still able to continue the operation on my duke window.

Thank you in advance:)

[EugeneTeu]

I assume youre on macOs?

https://stackoverflow.com/questions/53800953/focus-and-unfocus-javafx-application-leads-to-assertion-failure-on-macos-mojav
https://stackoverflow.com/questions/52323438/assertion-failure-in-nsevent

Seems likely to be a dependency issue with your mac version of jdk. Might want to double check the versions u are on.
Seeing some bugs reported by users on macOs too.

I highly suspect is cause of the version of java intellij runs duke on.

[TianYong-Goh]

@EugeneTeu Yup I am on macOs and my current version is JDK11.0.5. I look through the website you provided but it doesn't seem to provide any solution on this error except updating JDK, but we are restricted to JDK11 right?

[EugeneTeu]

About the restriction, not sure about it, can @damithc confirm?
Yea, most of the solutions I found is to update jdk. Can check with ur peers on mac which version they are using too, If its the same then my hunch might be wrong and its not the versioning causing it.

[damithc]

About the restriction, not sure about it, can @damithc confirm?

The produced jar file is required to be compatible with Java 11 runtime. Any incompatibilities will be considered a bugs (and penalized). Hence, it is safer to use JDK 11 for development as well.

[zyifanz]

Is there any way to solve this issue without updating JDK? I encountered the same problem on macOS as well.

[ktaekwon000]

Have you tried changing the version of javafx to 11.0.2 in the build.gradle file? According to the bug tracker for javafx the fix has been backported to version 11.0.2, but I am not able to test since I'm on Windows.
This version upgrade doesn't require a newer version of JDK.

Keep in mind you might have to restart your IDE for the changes in build.gradle to take effect.

[TianYong-Goh]

I think it works. Thank you very much.