Yes! I agree. You can update the path for python3 by executing py3_env.bat. So a saga_env.bat containing below would be useful SET SAGA_MLB=%OSGEO4W_ROOT%\apps\saga\modules PATH %OSGEO4W_ROOT%\apps\saga;%OSGEO4W_ROOT%\apps\saga\modules;%PATH% -- Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-Developer-f4099106.html