Native image executable: could not find or load main class

[tpetillot]

Expected behaviour

graalvm-native-image:packageBin produce an executable, that can be execute from anywhere if exported.

Actual behaviour

graalvm-native-image:packageBin produce an executable, that work properly if started in target/graalvm-native-image. But doesn't If moved anywhere else, or if target/scala-2.13/classes are deleted:

Error: Could not find or load main class io.tpetillot.hellograalvm.Main
Caused by: java.lang.ClassNotFoundException: io.tpetillot.hellograalvm.Main

From my understanding, produced executable include everything needed (with exception for classes access through reflection).

Here i'm running a simple hello world.

As it's my first steps with GraalVM and native images, I'm surely missing something?

Information

• sbt-native-packager version 1.9.16
• SBT version: 1.8.2
• OS: Windows 11 (Version 22H2 OS Build 22621.155)
• GraalVM Native image

[tpetillot]

It work with option --report-unsupported-elements-at-runtime. But I cannot understand why:

-report-unsupported-elements-at-runtime: report the usage of unsupported methods and fields at runtime when they are accessed the first time, instead of an error during an image building.

I did not get an error during image building, but when executing elsewhere than where it was...

--no-fallback also works, but I don't get the underlying reason aswell.