Hi, Julius. Thank you for responding to my question.

I work for Department of Veterans Affairs. I believe the coding standard including prohibiting argumentless or exclusive NEW is not new.

Someone modified old code to become non-interactive. Unfortunately they did not follow coding standard and now it is up to me to fix it. I found where variables are killed.

I think a class method using procedure block should be equivalent to exclusive new. All variables are hidden except parameters or public list.

I found the code responsible for Killing variables. I understand why I get <UNDEFINED> when I run the original legacy code WITHOUT the Exclusive NEW.

I recently watched the video and I want to implement something like what is in the demo:

https://community.intersystems.com/post/video-selecting-right-source-con...