Hi All,
You may be getting an error for homework 1 which doesn't properly process the data in the data analysis node despite the previews from the type nodes showing that your data imported properly. I'm not entirely sure why this happens, but I would try the following to see if it solves the problem:
1) Delete your data import node and reimport your data
2) Be sure you select "pair and discard" for double quotes and also select the box "automatically recognize dates and times"
3) Reconnect your data import node to the rest of your stream and run it again
Let me know if you are having any other problems!
John