Problem
The ucs@school module is not accessible after an update any more. Additionally you can see a traceback like this:
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/univention/management/console/base.py", line 242, in execute
function = getattr(self, method)
AttributeError: 'Instance' object has no attribute 'get_schools'"<br />
Solution
Re-Install the ucs@school module helped in this case.