Linux installation failing

#1 · 27. 2 月 2020, 13:00

Hello,

I'm trying to install Prism v1.2.0 on Ubuntu 19.10.
I'm following the installing documentation https://prism-pipeline.readthedocs.io/en/latest/index/feature_reference/#installation-dialog

I downloaded the tar.gz and extracted it in home/me/bin/ in which I should install Prism. I previously added home/me/bin/ in the PATH variable, if I run %echo $PATH there is that path at the end of the string.
Then, if I run:

% cd /home/me/bin/Prism_v1.2.0_Linux/
% sudo ./Prism_setup_Linux.sh

I get:

Traceback (most recent call last):
File "Scripts/PrismInstaller.py", line 65, in <module>
from PySide.QtCore import *
ImportError: libpython2.7.so.1.0: cannot open shared object file: No such file or directory
Traceback (most recent call last):
File "Scripts/PrismCore.py", line 68, in <module>
from PySide.QtCore import *
ImportError: libpython2.7.so.1.0: cannot open shared object file: No such file or directory

I found another post in this forum in which there were adviced to rename a "lib_inactive" folder into "lib" inside .../Prism_v1.2.0_Linux/Prism/PythonLibs/, but in my case it was already named simply "bin". I have both python 2.7.17 and python 3.7.5 installed on this system. Also I'm not very familiar with Linux systems, so maybe I can be doing something wrong.

Thank you in advance

#2 · 27. 2 月 2020, 14:26

The Prism installer needs Python 2.7 at the moment, but I think your default python version on Ubuntu 19 is python 3. You can check by typing "python" in a terminal.

You could change the default python to python 2.7, but it would be easier to change these two files in your Prism directory:

Linux_Setup_Integrations.sh
Linux_Setup_Startmenu.sh

They contain commands, which starts with "python", which uses your system default python. Instead you can replace "python" by the command or the absolute filepath of your python 2.7 installation. I don't have Ubuntu 19 here to check the exact location of python 2.7, but that should be easy to find.

#3 · 27. 2 月 2020, 15:18

actually typing just "python" in my terminal it runs Python 2.7.17, so python2 should be the default python in my system.

Anyway, I replaced the "python" commands in that two files with "/usr/bin/python2" (which is my python install path), for example in Linux_Setup_Integrations.sh:

/usr/bin/python2 "Scripts/Linux_Pre-Install.py"
/usr/bin/python2 "Scripts/PrismInstaller.py"

but the error remains.

#4 · 27. 2 月 2020, 15:44

After googling a bit it seems like libpython2.7.so.1.0 should exist somewhere on your system already. I'm not sure why it can't be found, but there are quite a few solutions on google. I'd have to install ubuntu 19 to figure out if it's because of the OS or something else. I'll install it when I find the time, but maybe you can solve it in the meantime with one of the solutions if you search for that error message.

#5 · 27. 2 月 2020, 15:55

thank you very much, I'll try to figure it out