If you can covert it to FMv7 first,that's when the file extension change occurred .fp7
Then change to FMv11 everything should convert no problems. I have converted FM5 without going to through FMv7 and it does work just has one file it cant find when I go to manage database. All I do is hit cancel on the errror and it wors fine from then on out.
I'm not sure what a file extension change has to do with my situation. Can you clarify?
Also - I know the portal fields are troublesome to export. Are you well versed in them?
Thanks for your time!
Trying downloading the free 30 day trial of Filemaker 11 and use it to open your database files. It'll create new converted copies and you can test them to see what works and what doesn't. I converted over 50 files from 5.5 to Version 10 a while back and the changes needed to get them fully functional were pretty minor.
Before doing that, read this knowlegebase article on File Conversion: http://help.filemaker.com/app/answers/detail/a_id/750/kw/converting