Journal error after building from tarball in Manjaro

Hi,
   after running for some time sucessfully schooltool in a ubuntu machine, I'm working now in a machine with manjaro linux (based in archlinux). In order to continue with schooltool, I've tried to compile it from the source tarball.
The steps I've followed were:
* I've looked for the dependencies and installed them.
* I've downloaded the source tarball from launchpad. (2.4.2)
* I've included the plugins in buildout.cfg. Since my system has python3 as the default, I've changed python -> python2 and virtualenv -> virtualenv2 in Makefile.

After that, I could build it with 'make' apparently without errors. 'make test ftest' also without errors. After creating the instance, 'make run' started the daemon and all seemed to run fine.
After the first steps in the configuration of the school I've found a problem when I try to create the schedule of the sections. I suppose it is in the journal plugin. The error is the following (manage.html -> Errors):
***************************
Exception traceback
Hora Tue Aug 6 23:18:58 2013
Usuario unauthenticated, sb.person.moises, Iglesias González, Moisés
Request URL http://localhost:7080/comment_cell
Exception Type NotFound
Exception Value Object: <schooltool.app.app.SchoolToolApplication object at 0xac792ac>, name: u'comment_cell'
Traceback

Traceback (most recent call last):

    Module zope.publisher.publish, line 129, in publish
    obj = request.traverse(obj)
    Module zope.publisher.browser, line 540, in traverse
    ob = super(BrowserRequest, self).traverse(obj)
    Module zope.publisher.http, line 457, in traverse
    ob = super(HTTPRequest, self).traverse(obj)
    Module zope.publisher.base, line 260, in traverse
    obj = publication.traverseName(self, obj, entry_name)
    Module zope.app.publication.zopepublication, line 198, in traverseName
    ob2 = adapter.publishTraverse(request, nm)
    Module schooltool.traverser.traverser, line 80, in publishTraverse
    raise NotFound(self.context, name, request)

NotFound: Object: <schooltool.app.app.SchoolToolApplication object at 0xac792ac>, name: u'comment_cell'

Display traceback as text
Solicitude
HTTP_ACCEPT: text/html, */*; q=0.01
CONTENT_TYPE:
HTTP_REFERER: http://localhost:7080/schoolyears/2012-2013/ver%C3%A1n/sections/1/journal
wsgi.multithread: True
SCRIPT_NAME:
wsgi.input:
REQUEST_METHOD: GET
HTTP_HOST: localhost:7080
PATH_INFO: /comment_cell
SERVER_PROTOCOL: HTTP/1.1
QUERY_STRING:
wsgi.version: (1, 0)
HTTP_X_REQUESTED_WITH: XMLHttpRequest
zope3_cs_16655f33: RVhy.0xEaI.uz2mJBdo2qhkWZBU1engp95pN9dLI8xatwzP6EzsGvE
CONTENT_LENGTH: 0
HTTP_USER_AGENT: Mozilla/5.0 (X11; Linux i686; rv:22.0) Gecko/20100101 Firefox/22.0
HTTP_CONNECTION: keep-alive
HTTP_COOKIE: MOODLEID1_=D%2505M%2507%25A8%25CE; zope3_cs_16655f33=RVhy.0xEaI.uz2mJBdo2qhkWZBU1engp95pN9dLI8xatwzP6EzsGvE
SERVER_NAME: 127.0.0.1
REMOTE_ADDR: 127.0.0.1
wsgi.run_once: False
MOODLEID1_: D%2505M%2507%25A8%25CE
wsgi.errors: ', mode 'w' at 0xb73040d0>
wsgi.multiprocess: False
HTTP_ACCEPT_LANGUAGE: gl-gl,gl;q=0.8,en-us;q=0.5,en;q=0.3
wsgi.url_scheme: http
SERVER_PORT: 7080
paste.httpserver.thread_pool:
HTTP_ACCEPT_ENCODING: gzip, deflate
***********************

I can use the other parts of schooltool (for instance, gradebook works fine) but not the daily attendance.

To check if it is a problem with manjaro, I've repeated all the steps in a xubuntu machine (building from the sources) with the same errors so I think it is a different problem. When I install it from the ubuntu package (in xubuntu machine) it runs without issues.

Any idea about the problem.
Thank you in advance.
Regards
Moisés