[whpalmer4]

As I commented to the ninja who fielded the email portion of my report, you could really do a bit more work to forestall support calls on this issue. The error message could suggest that this was a possible issue, and so could the online documentation (which at least mentions the flat file option, but effectively dismisses it as useful only to those who know what it does!) I know I've seen this come up on the forums more than once, and I only follow OmniGraffle threads with a "hey, I oughta learn something about this program one of these days" attention level.