http://bugs.winehq.org/show_bug.cgi?id=59651 --- Comment #2 from Bernhard Übelacker <bernhardu@mailbox.org> --- Unfortunately could not really follow this 0xffffffff back to a specific API call. But these MDB files may be a "Lightning Memory-Mapped Database". https://www.symas.com/symas-embedded-database-lmdb The observed opening sequence may match around this publicly available source code: https://github.com/LMDB/lmdb/blob/mdb.master3/libraries/liblmdb/mdb.c#L5079 So maybe building and running the tests of this module may show the same issue, while giving a chance to debug with symbolic debug informations ... -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.