http://bugs.winehq.org/show_bug.cgi?id=15759
--- Comment #6 from Dmitry Timoshkov dmitry@codeweavers.com 2008-10-26 08:05:52 --- (In reply to comment #5)
The app seems to start without issues with such a path on Windows, so it doesn't seem to be an application bug in this case.
I'm curious, how have you managed to create a configuration with Z: drive under Windows?