File that was generated on the go could not be attached to email

[Akshaya-Shankar]

Hi,
I have a script named generate_report.js that generates cucumber_report.html. I need the cucumber_report.html file to be sent via e-mail. When I provide it in attachments field, I'm unable to see that file in e-mail. But inside my pipeline, I could print and see the contents of cucumber_report.html.

Please provide a solution for this