https://bugs.winehq.org/show_bug.cgi?id=38115
--- Comment #1 from Christian Wehrmeyer c.wehrmeyer@gmx.de --- I found the cause of the problem.
I disassembled the code further and found out that Wine seems to have a problem with old DOS pathnames. If the game, for example, tries to load in the file "kami01.vms.adx", this attempt failes because there's only a "kami01~1.adx" available. My workaround involves renaming all the DOS file names into "correct" ones, but as you can imagine, this is a bit of work that can be avoided completely if Wine was capable of finding the file behind the DOS paths.
Windows, as I said, has no problems finding the correct files, so this is no feature request, but a bugfix.