Greetings!
You might all be familiar with the popular message bus system i.e. DBus. It is an inter-process communication (IPC) and remote procedure call (RPC) mechanism that allows communication between multiple computer programs concurrently running on the same machine.
DigiKam earlier used DBus under Linux system, but its support under Windows and OS X made digiKam unstable. The database core implementation based on DBUS was only used with old KIOSalve which is now removed.
In the current version, DBus is now optional for Linux and completely removed for Windows and OS X. It is now a thread, not a separate process.
After more than 1 year of development, digiKam 5.0.0 release plan updated and finalized… Do take a look!
Bonne Journée!
swatilodha 
Did you know that by setting KDE_FORK_SLAVES as environment variable you could allow using KIO in Windows without DBus?
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KIO and DBus make a big puzzle under windows and never work for digiKam. This need a lots of run-time dependencies. We need something more simple definitively. The solution adopted by digiKam team work perfectly now under Windows and OSX.
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DBUS has been now made optional for digiKam. And as far as dependencies are concerned, they’ve been reduced significantly.
I recommend you to try 5.6.0 version.
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