Hmm I wonder if it has something to do with:
The bug description mentions ORA-06502, but get_file has a when others exception handler that simply returns "Access Denied".
What do you folks think?
I love answering my on questions.
It the past and in earlier versions of Oracle Apex when I've used File Format "Database" option and clicked on the app's link to download it worked. For some reason in Apex 4.2.2 it doesn't. Anyway the other two options UNIX and DOS work just fine so I'm good. Disregard my question.