MMF2 apps and DEP (Data Execution Prevention)

[Nifflas]

Most new computers support DEP and the protection is often enabled by default with pre-installed versions of Windows (we're definitely gonna see more of DEP in the future).

However, DEP also makes MMF2 applications not work properly. No MMF1.5 applications actually will work if DEP is enabled (they will fail to extract the extensions), and DEP have some nasty side effects on MMF2 applications. In Knytt, I could not hear any music or sound before I added the application to the list of DEP exceptions.

More information about DEP is avaliable here.

To see your DEP settings: Control panel -> System -> Advanced (tab) -> Performance Settings

During the start of some other non-mmf applications, a window will appear saying that the application is potentially dangerous and it must be added to the DEP exeption list in order to run. However, there's no no warning when launching MMF2 applications. You just lose some important functionality, and I suspect it can be more than just sound.

[Yves]

The problem with the sounds will be fixed in the build #244. This is the same problem that happens with all the MMF 1.5 extensions that have been developed with the z33z version of the MMF 1.5 SDK (he added optimisation options that make the extensions to crash when DEP is enabled, and we've used the same optimisation in the sound filters by mistake).

However this doesn't affect MIDI files, they work fine with DEP on my machine, so I guess that what you mean by "music" is just OGG files? If so, that's fixed.

Yves.