Hello Thierry, I have finally managed to get rid of my problem - I am still not entirely sure why I encountered it in the first place, but anyway:
In the simple demo app, I used to declare the template paths directly as static strings. In the more complex live app, the paths came from a HashMap - I have no clue why, but when I changed that and put in the paths as constant values at compile time, the problem ceased to exist. I am aware that this seems strange but if someone else encounters a similar problem - who knows, maybe this will help. At any rate - I have said it before, but cannot overemphasize it - thanks a great deal for your interest and your support in this matter! Best regards, Lutz