It would seem Standalone QT files work but not the reference files? I’m thinking my render files are causing problems.
I had to urgently export a Quicktime file for upload to vimeo and this worked but I then sent my project to Colour and did some quick grading before sending it back to FCP7 and it didnt work.
I also noticed, that although I thought I had set all scratch disks to my clients external HDD my Macbook HDD is rattling up in usage, but I cant find where.
Finally, I noticed that if I delete all my render files before export and then export without rendering it “seems” to work.