What error message do you get when the files won't open? How are the files being opened, through an export/open after export type step? How are the files added to the database, as reference?
I don't get an error message. Normally I double click on the document title, which is the entry in the container field. I add the files by using the menu command "Insert file..."
It depends on the options used when inserting the document. If you use Insert File, with the store a reference option specified, double clicks will open the file. If you do not use store a reference or use Insert Picture instead of Insert File, double clicks will not open the file.
In all of these cases, though, export field contents will open a new copy of the file at a location you specify.
Thanks. It looks like I just needed to check the box "store a reference." Problem solved.