From the stack:
```
TypeError: Object 3 has no method 'reduce'
  at report (/Users/jasghar/myhubot/node_modules/hubot-scripts/src/scripts/dice.coffee:42:9, <js>:29:27)
```

That line is:
```coffeescript

total = results.reduce (x, y) -> x + y
```

It looks like rollOne just returns an integer, but roll returns an array. So, either leave it as it was originally, or wrap in an array like `msg.reply report [rollOne(6)]`. Looking back at the earlier post you were super close, just had the string interpolation around it.