Thanks for your reply..which I'm afraid I understand only in part!
To give you a tentative answer, I'm using CPA 2.0 (r11710) which I downloaded from the CP webpage and yes, both CP and CPA are installed and running on the VrtualBox machine.
If it may help, all images and resulting analysis are stored on a server (so not locally) in our institute and both Mac and VirtualBox have access to it. It worked perfectly from my Mac before but perhaps there's a problem with CPA/VirtualBox/Server? It looks like CP from VirtualBox access the raw images without a problem and stores the results also without a problem so I guess that's fine..
I tried to access the trunkbuild you suggested but the link to the trunkbuilds for CPA at the bottom of the page gives me an error (looks like I'm doomed with error messages..):
OSError Python 2.4.2: /usr/bin/python
Mon Jun 29 06:48:08 2015
A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.
31 best_mac_dir, best_mac_file = find_latest(MAC_DIR, ".dmg")
32 best_win32_dir, best_win32_file = find_latest(WIN32_DIR, ".exe")
best_mac_dir undefined, best_mac_file undefined, find_latest = , MAC_DIR = '/imaging/analysis/CruiseControl/artifacts/CPAnalyst'
/web/wwwprod/sites/cellprofiler.org/cgi-bin/trunk_build_cpa.cgi in find_latest(directory='/imaging/analysis/CruiseControl/artifacts/CPAnalyst', extension='.dmg')
12 def find_latest(directory, extension):
13 latest = 0
14 for subd in os.listdir(directory):
16 myself = int(subd)
subd undefined, global os = , os.listdir = , directory = '/imaging/analysis/CruiseControl/artifacts/CPAnalyst'
OSError: [Errno 2] No such file or directory: '/imaging/analysis/CruiseControl/artifacts/CPAnalyst'
args = (2, 'No such file or directory')
errno = 2
filename = '/imaging/analysis/CruiseControl/artifacts/CPAnalyst'
strerror = 'No such file or directory'