This issue drove me crazy for days. I tried finding an answer in here and other forums to no avail. I am writing this hoping someone else needs it.

 I'm using Draftsight 2023.I wanted to print several drawings into a single PDF file, I used to be able to do this but for some reason it wouldn't give me the option to "Publish as Multi-sheet PDF". Also note that the PDF options is grayed out. 

I created a Batch configuration file and tried using both "Microsoft print to PDF" and Adobe PDF as the printer and neither PDF printers worked.

 What solved the issue is when I finally scrolled down and found the "PDF" as the printer name.

Anyway, this solved the issue and I hope to save someone else the frustration.