The title pretty much says it all. The details:
I have Office 365 at work, but a server in the shop still Windows 2008 and Access 2007. Besides work, I have some private customers, and one of them is still on 2007. Until now, I have been developing on my work machines, which all have 365, then copying it to this old server and re-compiling it there. Occasionally it meant diddling some detail where I had used a new feature that was not available in 2007, but it was always a trivial tweak, and the shipped version of the database worked fine on the user's machine.
That has suddenly started throwing a fit. I copied my latest build to the server, but now I am suddenly getting a warning about version incompatibility - a small 'ribbon' under the main ribbon with this message. The message also has a button labelled "More information", which attempts to call a MS website, but fails.
There is no indication of just what is the incompatibility. I've tried decompiling and recompiling - no change. C&R - no change. Completely removing everything (all objects and code, a piece at a time) from the database - no change. I've tried the Save As... dialog to force the 2007 format - no change.
I may have to start with a clean new 2007 database and import everything, but there is a lot of stuff to import that the wizard doesn't handle, so I would have to do those by hand, which is a PIA.
The MS website has nothing helpful - just generic stuff which I've either already tried or doesn't work. Does anyone have any ideas on how I might track down and fix what this incompatibility might be?