Using the application without Java installed

[nordlicht]

RouteConverterPortable depends on a Java Runtime, so the OpenJDK runtimes should work, too. Did you test that?

I've noted jPortable because it wasn't obvious for me, where to find a Java that's portable.

RCportable did not find the OpenJDKRE, maybe it can be solved with a recursive search:

   

On a Linux machine I am running RC with OpenJDKRE 11 without problems.