Some times ago I installed qtikz on my system, but I don't remember if I did it via dpkg -i --force-architecture or directly from source (perhaps via checkinstall). In short, it is not working and I want to replace it with the qtikz 64 bit version of ubuntu precise (I am using ubuntu natty). So I downloaded the package and did:

sudo gdebi qtikz_0.10-1_amd64.deb

Which gives the error message:

dpkg: error processing qtikz_0.10-1_amd64.deb (--install):

 qtikz: 0.10-1 (Multi-Arch: no) is not co-installable with qtikz:i386 0.10-1 (Multi-Arch: no) which is currently installed

Errors were encountered while processing:

 qtikz_0.10-1_amd64.deb

Then I tried to purge the old qtikz via aptitude: sudo aptitude purge qtikz, which gives me: No packages will be installed, upgraded, or removed. Similar result with dpkg -r qtikz.

aptitude search qtikz gives no results.

and via apt-get I get:

sudo apt-get purge qtikz

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Virtual packages like 'qtikz' can't be removed

locate qtikz results in

/usr/bin/qtikz

/usr/lib/mime/packages/qtikz

/usr/share/qtikz

/usr/share/applications/qtikz.desktop

/usr/share/doc/qtikz

/usr/share/doc/qtikz/changelog.Debian.gz

/usr/share/doc/qtikz/changelog.gz

/usr/share/doc/qtikz/copyright

/usr/share/kde4/apps/ktikz/locale/qtikz_de.qm

/usr/share/kde4/apps/ktikz/locale/qtikz_es.qm

/usr/share/kde4/apps/ktikz/locale/qtikz_fr.qm

/usr/share/man/man1/qtikz.1.gz

/usr/share/menu/qtikz

/usr/share/mime/packages/qtikz.xml

/usr/share/pixmaps/qtikz16.xpm

/usr/share/pixmaps/qtikz32.xpm

/usr/share/qtikz/documentation

/usr/share/qtikz/locale

/usr/share/qtikz/qtikz-128.png

/usr/share/qtikz/templates

/usr/share/qtikz/documentation/qtikz.qch

/usr/share/qtikz/documentation/qtikz.qhc

/usr/share/qtikz/locale/qtikz_de.qm

/usr/share/qtikz/locale/qtikz_es.qm

/usr/share/qtikz/locale/qtikz_fr.qm

/usr/share/qtikz/templates/beamer-example-template.pgs

/usr/share/qtikz/templates/template_example.pgs

/usr/share/qtikz/templates/template_example2.pgs

/var/lib/dpkg/info/qtikz.list

/var/lib/dpkg/info/qtikz.md5sums

/var/lib/dpkg/info/qtikz.postinst

/var/lib/dpkg/info/qtikz.postrm

So any ideas, how to savely remove this package?