Hello,
This is an annoying issue for developers, the game actually recompiling script from the unpacked file even if -filePatching parameter is not set.
Just set up an unpacked file at your root folder of DayZ, like if you want to use -filePatching.
Put something in the script that will not compile it.
Launch your game without -filePatching parameter set.
The game will still tell you that he can't compile script, even if he should not compile unpacked file.