Hi Steve,
Yes, I can see what you ran into. I will admit that that particular example isn't worked out all that well. I more or less worked that out for myself and plonked it in for future reference. I assume you're referring to the fact that the tooltip of the inferenceObject shows the "GeneratingDistribution" key as $Failed? From what I can tell, that's just a bug in the code that generates the tooltip: if you evaluate obj["GeneratingDistribution"] it should still return the ProbabilityDistribution that was used to in the construction of the object. I'll try and patch it out in the next push to master.
It's continuing work in progress, though I my time and attention span to work on it is not super consistent. Glad to hear that you're giving it a try, though!
