Completed test #2 - loading a file over the wire

The test succeeded.

Had some issue with Interface Builder caused by the tutorial I was following-it read like "drag the blue Object into the Interface Builder". It turned out it was from the "Library" that you drag the Object, and only if you narrow down the Library to "Cocoa->Objects and Controllers", you will see the "Object" at the top of the list.

Figures....this caused me to pull my hairs for over 2 hours. Devil is in the details.