Whoa.... Deception, 'not open'?  Oberon is the epitome of 'open source', as it looks to me so far. In fact, that is what is so amazing about it. Someone like me, a total noob to Oberon, being able to trace down my issue so easily is a testament to that. No other language is as 'open', or even close to being more 'open'.

I would venture to guess that Professor Wirth, by in-lining these particular procedures, did so to for a good reason. Probably the performance gains warrant a wee bit of extra complexity?

The Oberon interface/desktop? My mouse has me totally lost, haha. I finally figured out why the compiler wasn't working. I had stray selections highlighted in other panels affecting the commands. You don't just sit down and go in Oberon like other OS's. I see Oberon demands you to relearn from the ground up. Of coarse, this is good and necessary to understand how to use Oberon's advanced features.