Running Call to Server and Retrieve Data with RETSCLI

Hey RSS, not sure if you're still active on this - but I'm hoping to run [https://github.com/summera/retscli] within KNIME. Is it possible? I've confirmed RETSCLI works in command prompt, but porting the script as is into the "Script" tab within the Ruby Script node did not work. I think it would - but hoping for a bit of guidance. Thank you.