python cntkDemo.py error on Ubuntu 14.04 about ell HOT 3 CLOSED

> ImportError: libmpi_cxx.so.1: cannot open shared object file: No such file or directory

I wonder if "sudo apt-get install libopenmpi-dev" will solve this problem?

There's a lot more CNTK Linux instructions if that doesn't work, one would assume the conda cntk python package should have taken care of all these prerequisites, but perhaps it has a bug...

from ell.

@lovettchris Thank you for providing the info, I'll try it later.

from ell.

@lovettchris
sudo apt-get install libopenmpi-dev can't solve the problem because on Ubuntu 14.04 the package installed by this way is too old:

[codelast@ ~]$ apt-cache show libopenmpi-dev
Version: 1.6.5-8

[codelast@ ~]$ ll /usr/lib/libmpi.so*
lrwxrwxrwx 1 root root 27 7 12 00:03 /usr/lib/libmpi.so -> /etc/alternatives/libmpi.so
lrwxrwxrwx 1 root root 15 12 29 2013 /usr/lib/libmpi.so.1 -> libmpi.so.1.0.8
lrwxrwxrwx 1 root root 27 12 29 2013 /usr/lib/libmpi.so.1.0.8 -> openmpi/lib/libmpi.so.1.0.8

While ELL requires libmpi.so.12, so I have to do the following things:

(1) uninstall all the openmpi-related packages on my Ubuntu 14.04:

sudo apt-get remove libmpich-dev mpi-default-dev libopenmpi-dev libopenmpi1.6 openmpi-common

(2) download the openmpi-1.10.2.tar.gz package on this web page, and then :

tar zxf openmpi-1.10.2.tar.gz
cd openmpi-1.10.2/
./configure
make
sudo make install

(3) check the installation:

[codelast@ ~]$ sudo find ./ -name libmpi.so.12
./usr/local/lib/libmpi.so.12

That's it! Problem solved!

from ell.