Ubuntu – E: Package ‘libpng12-0’ has no installation candidate [ubuntu 16.10 Gnome]

Hi there has been several updates to skype in span of a day, try to do a --purge remove skype and reinstall. you can also install skype-bin if this doesn't work. It will give you latest skype.

I installed aptitude and got these proposed solutions:

$ sudo aptitude install makerware
The following NEW packages will be installed:
  avrdude{a} conveyor{a} conveyor-common{a} conveyor-ui{a} libarmadillo4{a} 
  libarpack2{a} libboost-program-options1.54.0{a} libcoin80{a} libdap11{a} 
  libdapclient3{a} libdigitizer{a} libepsilon1{a} libfreexl1{a} libftdi1{a} 
  libgdal1h{a} libgeos-3.4.2{a} libgeos-c1{a} libgraphicsmagick3{a} 
  libhdf4-0-alt{a} libhdf5-7{a} libjsoncpp0{a} libkml0{a} libmbqtutils{a} 
  libmysqlclient18{a} libnetcdfc7{a} libogdi3.2{a} libopenmesh-3.2{a} 
  libopenscenegraph99{a} libopenthreads14{a} libpq5{a} libproj0{a} 
  libqt5multimedia5{ab} libqt5multimediawidgets5{a} libspatialite5{a} 
  libthing{a} libtinything{a} libtoolpathviz{a} liburiparser1{a} 
  libxerces-c3.1{a} libxine2{a} libxine2-bin{a} libxine2-doc{a} 
  libxine2-ffmpeg{a} libxine2-misc-plugins{a} libxine2-plugins{a} 
  makerbot-driver{a} makerware mb-libjsonrpc{a} mb-libopencv2.4{a} 
  mb-libstdc++6{a} mb-libvtk5.10{a} mb-pyserial{a} miracle-grue{a} 
  mysql-common{a} proj-bin{a} proj-data{a} 
0 packages upgraded, 56 newly installed, 0 to remove and 0 not upgraded.
Need to get 206 MB/206 MB of archives. After unpacking 340 MB will be used.
The following packages have unmet dependencies:
 libqt5multimedia5 : Depends: qtbase-abi-5-2-1 which is a virtual package.
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     libqt5multimedia5 [Not Installed]                  
2)     libqt5multimediawidgets5 [Not Installed]           
3)     makerware [Not Installed]                          



Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:

      Remove the following packages:                                            
1)      libqt5help5                                                             
2)      libqt5xmlpatterns5                                                      
3)      musescore                                                               
4)      qml-module-qtquick-localstorage                                         
5)      qml-module-qtquick-window2                                              
6)      qml-module-qtquick2                                                     
7)      qml-module-qtwebkit                                                     

      Install the following packages:                                           
8)      libqt5positioning5 [5.2.1-1ubuntu2 (now, trusty)]                       
9)      libqt5sensors5 [5.2.1+dfsg-2ubuntu2 (now, trusty)]                      

      Downgrade the following packages:                                         
10)     libqt5clucene5 [5.3.0-5~trusty1 (now, trusty) -> 5.2.1-8build1 (trusty)]
11)     libqt5core5a [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1u
12)     libqt5dbus5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1ub
13)     libqt5gui5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1ubu
14)     libqt5network5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-
15)     libqt5opengl5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1
16)     libqt5printsupport5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+
17)     libqt5qml5 [5.3.0-3ubuntu13~trusty1 (now, trusty) -> 5.2.1-3ubuntu15.1 (
18)     libqt5quick5 [5.3.0-3ubuntu13~trusty1 (now, trusty) -> 5.2.1-3ubuntu15.1
19)     libqt5sql5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1ubu
20)     libqt5sql5-sqlite [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+df
21)     libqt5svg5 [5.3.0-2~trusty1 (now, trusty) -> 5.2.1-1 (trusty)]          
22)     libqt5test5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1ub
23)     libqt5webkit5 [5.3.0+dfsg-1ubuntu2~trusty1 (now, trusty) -> 5.1.1-1ubunt
24)     libqt5webkit5-qmlwebkitplugin [5.3.0+dfsg-1ubuntu2~trusty1 (now, trusty)
25)     libqt5widgets5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-
26)     libqt5xml5 [5.3.0+dfsg-2ubuntu9~trusty1 (now, trusty) -> 5.2.1+dfsg-1ubu
27)     qtdeclarative5-localstorage-plugin [5.3.0-3ubuntu13~trusty1 (now, trusty
28)     qtdeclarative5-qtquick2-plugin [5.3.0-3ubuntu13~trusty1 (now, trusty) ->
29)     qtdeclarative5-window-plugin [5.3.0-3ubuntu13~trusty1 (now, trusty) -> 5



Accept this solution? [Y/n/q/?]

It seems that when I added the repository for MuseScore and upgraded MuseScore to 2.0, it also updated qt to 5.3 which seems to be incompatible with Makerware.

For now, it looks like I have to downgrade MuseScore or not use Makerware.