The mistake, I have done, was exactly what you hinted to in your P.S.
The problem is, that this is one of the mistakes that does not throw any accurate error (at least none that points to the actual cause). So, I am only half-emberrassed to have stumbled over that.
OpenSource projects do not have the large testing teams like big companies have. According to the chain of dependencies and the nested logic it is quite natural that important details and informations like that are hiding somewhere or can easily be overseen.
So let’s keep that in mind and let’s think about tools of improving the communication between user and supplier. The tools need to become smarter than just having text pipes like in common chat rooms.
But this is not meant to be critizism against you or the HAXE community. You have done a great job. Thanks again.