When you run in external mode, it is not different from any other Node.JS environment.
Both context.log and console.log should work to show up logs in your terminal. If you’re not seeing the consoles, I’ll need you to send me screenshot of your code and your terminal with the analysis running.
Another way to Debug is using VSCode and run the Debugger in attach mode. Here is an example of the launch.json
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
Then you can run the script by using node --inspect ./analysis.js and run the Debugger on Vscode.
About the Tago-Builder, I’ll get in contact with the TagoIO team to have it fixed, thanks for reporting this.