On 24/12/15 16:26, Austin Hendrix via ros-release wrote:
> It looks like the new collada packages that were pulled in recently are
> causing upgrade problems.
>
> I did an apt-get dist-upgrade on my system today, and it looks like
> there's a collision between collada-dom2.4-sp-dev and
> collada-dom2.4-dp-dev, and apt wants to install both at the same time:
>
> $ sudo apt-get install -f
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> Correcting dependencies... Done
> The following extra packages will be installed:
>    collada-dom2.4-sp-dev
> The following NEW packages will be installed:
>    collada-dom2.4-sp-dev
> 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
> 47 not fully installed or removed.
> Need to get 0 B/206 kB of archives.
> After this operation, 5,285 kB of additional disk space will be used.
> Do you want to continue? [Y/n]
> (Reading database ... 333408 files and directories currently installed.)
> Preparing to unpack
> .../collada-dom2.4-sp-dev_2.4.4.1-ubuntu1~trusty1_amd64.deb ...
> Unpacking collada-dom2.4-sp-dev (2.4.4.1-ubuntu1~trusty1) ...
> dpkg: error processing archive
> /var/cache/apt/archives/collada-dom2.4-sp-dev_2.4.4.1-ubuntu1~trusty1_amd64.deb
> (--unpack):
>   trying to overwrite
> '/usr/lib/cmake/collada_dom-2.4/collada_dom-config.cmake', which is also
> in package collada-dom2.4-dp-dev 2.4.4.0-ubuntu1~trusty1
> dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
> Errors were encountered while processing:
>   /var/cache/apt/archives/collada-dom2.4-sp-dev_2.4.4.1-ubuntu1~trusty1_amd64.deb
> E: Sub-process /usr/bin/dpkg returned an error code (1)
>
>
> Thoughts? Known workarounds?

This is a 'known' issue, see [1] and the linked issues in the answer. 
The packages have been fixed and are waiting for the next sync.


> Is there a known reason why apt would want to install the sp and dp
> versions at the same time? Up until now I think I've only had the dp
> version installed.
>
> If the sp and dp versions aren't supposed to be installed at the same
> time, can the maintainer please add a Conflicts: to the package header?


Gijs

[1] 
http://answers.ros.org/question/222892/collada-dom24-sp-dev-causes-dist-upgrade-to-fail-on-ubuntu-1404/

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