DVDit Pro playback message error

I use DVDit Pro for creating my photo slide show. But there is a problem that I don’t know why pop ups every time that I simulating playback. I have no clue why it gives me an error like that. I’ve noticed that when I close the program it’s still processing and I need to end this to task manager. Is the problem real in my software or in computer settings only?

DVDit Pro
Internal software error: buildDvdit_apprel60CodeDVDCreatorPrePlayStateClassesCVideoTitleSetData.cpp, line 535 -2
