RealiBanjo won't recognize my chord

The chords that RealiBanjo recognizes are: 

• major  
• minor
• dominant 7
• minor 7
• suspended 4ths

So you have to be careful that you’re actually playing a qualifying chord. It’s not that hard, really, but a number of people have written, asking why there’s no pattern when they play a D, an E and an F. It’s because it’s just a bunch of notes, not an actual chord.