Actually I might be able to give you some insight on this "no model field in record". I fought with it on all of the EPs over the years. After fighting again I looked, and sure enough. The delimiters were not right when I saved.

Using Openoffice,

Save As> under the options check "Edit Filter Settings", and then when the box comes up, even if it set right (comma delimiter, and "" for text), be sure to check "quote all text cells". Then save.

This has been my exact problem every single time I have fought with this issue, and I kept forgetting about it the next time I worked with files. It has always worked like a charm once I figured out my delimiters were screwy for each one I was working with.

Hope it helps.