consider blubber folders re #3973

git-svn-id: svn://develop.studip.de/studip/trunk@28668 c5b85792-5220-0410-ad23-ed5b6b8ad999
change relation for aux re #3943

git-svn-id: svn://develop.studip.de/studip/trunk@28669 c5b85792-5220-0410-ad23-ed5b6b8ad999
fix exception msg

git-svn-id: svn://develop.studip.de/studip/trunk@28670 c5b85792-5220-0410-ad23-ed5b6b8ad999