Comment 4 for bug 1408085

From the logs:

Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Setting up icedtea-netx:amd64 (1.5.1-1ubuntu1) ...
update-alternatives: warning: forcing reinstallation of alternative /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/itweb-settings because link group itweb-settings is broken
update-alternatives: warning: not replacing /usr/share/man/man1/itweb-settings.1.gz with a link
update-alternatives: warning: forcing reinstallation of alternative /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/itweb-settings because link group itweb-settings is broken
update-alternatives: warning: not replacing /usr/share/man/man1/itweb-settings.1.gz with a link
update-alternatives: error: alternative path /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/javaws doesn't exist
dpkg: error processing package icedtea-netx:amd64 (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of icedtea-7-plugin:amd64:
 icedtea-7-plugin:amd64 depends on icedtea-netx (= 1.5.1-1ubuntu1); however:
  Package icedtea-netx:amd64 is not configured yet.