When the path had space inside like open ("/Users/me/that app/one Big.app")
Processing read only /users/my/that"
If the path had no space like open("/Users/me/that_app/oneBig.app")
everithing is OK

that's a fact of life when dealing with the command line. usually you'd use
quotes to get around the situation, but more accurate is to use a String
array that contains each element of the command.

String[] s = { "/Users/blah/that app", "one Big.app" };
open(s);

edit]
my solution for open() with path with spaces

Sorry, your suggestion:

String[] s = { "/Users/blah/that app", "one Big.app" };
open(s);

don't work on my Mac

since you're on osx, it's even more tricky. look at what happens when you
open a .app on the command line and the error that comes up:

: /Applications/Preview.app
-bash: /Applications/Preview.app: is a directory

the solution is to use the osx "open" command, and make that the first
parameter of that String array.

other questions, please use the forum as this is not a bug.