dpkg --configure libapache2-svn -a
Setting up libapache2-svn (1.4.2dfsg1-2) ...
Enabling dav as a dependency
This module does not exist!
dpkg: error processing libapache2-svn (--configure):
 subprocess post-installation script returned error exit status 1
dpkg: error processing -a (--configure):
 no package named `-a' is installed, cannot configure
Errors were encountered while processing:
 libapache2-svn
 -a