LiveCode 6 and making standalone

[René Micout]

Hello everybody,
Macintosh Yosemite.
When I construct a standalone with LiveCode 6, I choose “Move substacks into individual stackfiles” (for saving data in substack)
this works with LC 6.6.3 > In the /Contents/MacOS/ of my application (ctrl + clic) I have 1 file (exec) + several stacks (substacks)
but when I do the same thing with LC 6.6.4, 6.6.5, 6.7, 6.7.1 (rc 4) I have only 1 file (exec) and my application cannot save any data.
Why ?
Is-it a bug ?
Tristement de Paris
René