Postscript: Indeed this was a real problem. I was able to reproduce it with a later test build of TheSky X. It needs to be tested for initialization completion after creating its interfaces, something I have never encountered with ActiveX servers. I was helped by Matthew Bisque and now the problem is solved the right way (in the released Planner 4.2). I am really glad I took my time releasing it, as this wasn't found by me until late last week!