We have a number of PowerPoint files that our users use on Dropbox that have a number of hyperlinks in them that link to PDF files that reside in the same file as the PPT file is.
Most of the time, this works fine.. The user clicks the button that has the hyperlink and the PDF is rendered no problem. But sometimes, especially after editing the PPT (not the hyperlink stuff, but other content in the PPT file), the links no longer work and we get the error message that say 'Cannot open the specified file'.
Our users use dropbox so that it 'replicates' their folders to their hard drives and they launch the PPT files by clicking them via Windows Explorer.. So the 'current folder' should be the folder that their PPT file is in (I think). But what's odd is when I go to examine the hyperlink when the PPT file on the replicated dropbox folder, it looks odd (as if the current folder is not defined correctly) and sometimes those links will work and sometimes they won't. See Image #1 below.
But if I copy that folder to place on my hard drive NOT on dropbox and launch it from that folder, looking at the same hyperlink, it looks fine and the 'current folder' is set properly. See Image #2 below.
So my suspicion is MS-Office and Dropbox just aren't playing nicely together when opening the file from the dropbox.