The Duo examples can be obtained from github here git clone https://github.com/Trovemaster/Duo/tree/master/examples

• On Windows, download the Exocross executable duo_win.exe and the batch file run_duo.bat from the github repository at https://github.com/Trovemaster/Duo/tree/master/ and place into a folder you will use for this tutorial.

To run from a window, edit and click on run_duo.bat. Form CMD, navigate to the folder with the input file and execute

 duo_win.exe < input_file  > output_file

A Windows (DOS) batch file has the following format:

REM example of a Windows batch file
duo_win.exe < BeH_Koput_01.inp > BeH_Koput_01.inp

• Download duo_linux_64.exe into a working folder.

Navigate to the folder with the input_file and execute from the command line:

 ./duo_linux_64.exe < input_file  > output_file

• Try the Mac version duo_mac.exe at github.

Many working Duo examples can be found at exomol.com as spectroscopic model files, see e.g. AlH