Accessing a Vdb on a locked volume?

[Giulio]

I'm in need to develop an RB application that runs directly from a dvd 
and reads data from a Valentina db contained on the same support.

my first attempt to burn app and db on a cd and run the app directly 
from the cd results on a -61 error, i imagine that the problem is 
caused by Valentina engina trying to create a .tmp on a locked volume.

I'm doing something wrong?

I there a solution to this problem?

Thank you,

          Giulio