Project GASphinx.exe raised exception class EInvalidEntity with message 'Class TJob is not a valid Entity. [Entity] attribute missing or entity does not belong to model.'.
Yep, maybe there is something more convoluted there with your model system and usage.
If you can reduce it to a minimal project reproducing the issue, we can tell better what's going on. Maybe in the process you will find out the issue yourself - that happens often. ;-)
Just trying to get my head around multi model. If I need to access the Sphinx Model from a Service created on the Business Model, I would need the Sphinx.Manager and the Business.Manager? How would I get the right contexts?