David Young

I've compared it to code that I have to do the same thing and it's identical so can't see anything else unfortunately. Only other thing is to check your CSV file. Open it in a text editor and try to use only 2 or 3 rows.
I had problems with CSV importing myself but it turned out to be the CSV file rather than the code.

Hi Mel, in your post on StackOverflow you have the route
collection {post :import }#do
# post :create
end
have you tried changing that to
collection {post :import }
The end at the end might have been causing problems.