- PTV Visum was unable to find a suitable Python 2.7/3.7 installation. - Python 2.7 and/or 3.7 is listed as 'not available' in the 'User Preferences' menu. - AddIns and Python scripts do not work.
Examples: Attempting to open Scripts -> Python Console results in a crash or an error message: 'No suitable installation of Python 3.7 was found'. AddIns like 'Calculate Matrix' cause an error message or a crash.