My MDO has no defined source, that is no transaction/query is given as data source.
I defined the MDO columns myself. I wanted to populate MDO using an INSERT MDO Query. Populating seems to work fine, at least debugger says Inserts are successful. (Same holds for delete statements)
I also tried to define a transaction as data source and used a life cycle task to popualte MDO - that one works fine - no trouble at all.
But when I want to start from scratch and define an empty MDO, SELECT does not work at all.