Hi, 
Thanks for the response. 
The output is as following. 

ubuntu@ubuntu:~$ sudo apt-get -s install python-dolfin dolfin-doc python-mshr 
mshr-demos python-uflacs
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dolfin-doc : Depends: libdolfin-dev (>= 1.6.0-1~ppa1~trusty1) but it is not 
going to be installed
 mshr-demos : Depends: libmshr-dev (>= 1.6.0-1~ppa1~trusty3) but it is not 
going to be installed
              Depends: libdolfin-dev (>= 1.6.0) but it is not going to be 
installed
 python-dolfin : Depends: libdolfin-dev (= 1.6.0-1~ppa1~trusty1) but it is not 
going to be installed
                 Depends: libdolfin1.6 (= 1.6.0-1~ppa1~trusty1) but it is not 
going to be installed
                 Depends: python-ffc (>= 1.6.0) but it is not going to be 
installed
                 Depends: python-netcdf but it is not installable
                 Depends: python-sympy but it is not installable
                 Depends: python-petsc4py but it is not going to be installed
                 Depends: libopenmpi1.6 but it is not installable
                 Depends: libpetsc3.4.2 but it is not installable
 python-mshr : Depends: libmshr-dev (= 1.6.0-1~ppa1~trusty3) but it is not 
going to be installed
               Depends: libmshr1.6 (= 1.6.0-1~ppa1~trusty3) but it is not going 
to be installed
               Depends: libdolfin1.6 but it is not going to be installed
 python-uflacs : Depends: python-ffc (>= 1.6.0) but it is not going to be 
installed
E: Unable to correct problems, you have held broken packages.

It might worth mentioning that when I run Ubuntu from a usb or VirtualBox, I 
select "try Ubuntu without installation".
Best Regards, 
Toheed 


     On Friday, August 21, 2015 1:34 PM, Johannes Ring <[email protected]> 
wrote:
   

 Please report back with the output from the following command:

sudo apt-get -s install python-dolfin dolfin-doc python-mshr mshr-demos 
python-uflacs

Johannes

On Fri, Aug 21, 2015 at 3:16 PM toheed ghandriz <[email protected]> wrote:

Hi, 
I am a windows user. I tried to install fenics on Unbuntu which I run from a 
Virtualbox. I run the following commands in the terminal as described in 
http://fenicsproject.org/download/ubuntu_details.html .
sudo add-apt-repository ppa:fenics-packages/fenics
sudo apt-get update
sudo apt-get install fenics
sudo apt-get dist-upgrade
For the third line I get the following error: 
ubuntu@ubuntu:~$ sudo apt-get install fenics
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 fenics : Depends: libdolfin-dev (>= 1.6.0) but it is not going to be installed
          Depends: python-dolfin (>= 1.6.0) but it is not going to be installed
          Depends: dolfin-doc (>= 1.6.0) but it is not going to be installed
          Depends: dolfin-bin (>= 1.6.0) but it is not going to be installed
          Depends: python-ffc (>= 1.6.0) but it is not going to be installed
          Depends: python-fiat (>= 1.6.0) but it is not going to be installed
          Depends: libmshr-dev (>= 1.6.0) but it is not going to be installed
          Depends: python-mshr (>= 1.6.0) but it is not going to be installed
          Depends: mshr-demos (>= 1.6.0) but it is not going to be installed
          Depends: python-uflacs (>= 1.6.0) but it is not going to be installed
          Recommends: python-scitools but it is not installable
E: Unable to correct problems, you have held broken packages.



This is my first time installation. The Ubuntu version is 14.04. What do I miss?
Thanks in advanced. 
Regards, Toheed_______________________________________________
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