FIXING PYTHON INITIALIZATION PROBLEMS

 After a fresh install of Clarisse, Clarisse may prompt you with an error message regarding a Python installation issue.

Please note that sometimes this error message is not displayed however, you only can see File > Quit in Clarisse’s application main menu bar. These problems typically occur when:

• Python is not properly installed on your operating system
• The location of the python path is not properly set
• A 32-bit version of Python is installed instead of a 64-bit one

To find the right solution we have first to identify what’s wrong with your installation.

A. Checking Python Installation

Press Windows + R keys to open the Run window, type python.exe and then press the Enter key.

If you have an error message such as:

Windows cannot find 'python.exe'. Make sure you’ve typed the name correctly, then try again.

Python is not properly installed. Go to Step B

If you see a command-line window displaying a message such as:

Python 2.7.13 (default, Dec 17 2016, 12:39:47) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

Python is properly installed you can directly skip to Step C. However, if you can read something like 32 bit instead of 64 bit (AMD64) you must first uninstall Python and then go to Step B

B. Making a clean installation of Python 2.7.x 64-bit

• Download Python 2.7.15 64-bit and run the install.
• When prompted make sure that Install for all users is selected otherwise it won’t work.
• During the install it is recommended to check Add python.exe to path
  
• Launch Clarisse and if the problem persists go to Step C
  
  

C. Editing clarisse.env file

• Press Windows + R keys to open the Run window, type python.exe and press the Enter key.
  Our goal here is to find where python is installed. Type import sys;print sys.path and press Enter key. You should get something like this:
  
  ['', 'C:\\WINDOWS\\SYSTEM32\\python27.zip', 'C:\\Python27\\DLLs', 'C:\\Python27\\lib', 'C:\\Python27\\lib\\plat-win', 'C:\\Python27\\lib\\lib-tk', 'C:\\Python27', 'C:\\Python27\\lib\\site-packages']
  
  In this example the path where python is installed is: C:\Python27
Store this path carefully
  
  
• Now you have to edit clarisse.env file. Open an Explorer (Press Windows + E) and go to this location: %APPDATA%/Isotropix/Clarisse
  You should see one folder for each version of Clarisse you have installed (for example 3.5, 3.6...). Go to the one you can’t launch due to the python error.
• Open clarisse.env file and create it if it doesn’t exist.
• Replace its content by:
  
  PYTHONHOME=PythonInstallLocation
PYTHONPATH=PythonInstallLocation/lib
IX_SHELF_CONFIG_FILE=$CLARISSE_BIN_DIR/shelves/shelf.cfg
IX_MENU_CONFIG_FILE=$CLARISSE_BIN_DIR/python/menus/init_menus.py


• Replace PythonInstallLocation by the path you carefully stored.
• You should now be able to launch Clarisse properly! Please note that you will be probably requested to set your licence back.