GridFS and accessing the Store

I’ve almost solved my ‘getting csv into a collection’ issue…but I am now getting this error:

Exception in setTimeout callback: ReferenceError: csvStore is not defined

from which I assume is from my FS.Store.GridFS named csvStore. Only think I can think of is that I’m not doing something right in my Meteor.method on my upload.js file in my /server/methods/ folder: https://github.com/jsonify/csv_uploader.

I specifically think this part of the method might be having the issue:

fs.createReadStream(csvStore)

Any suggestions?