Is there a limit to the length of a single cfoutput string in CF?

I use <cfoutput> to export a tab delimited text table for excel.  I added a bunch of fields to a working export and it's broken.  I doublechecked my syntax in the construction of the output string.  I am noticeing that intellisense stops working on the line at 512 characters. Could there be a limit to the length of a single line in a cfoutput export?

Is there a better way to export to Excel?

Thanks.