Failing somebody who has run into this before, I would suggest opening a WRC ticket so somebody from InterSystems can look at the relevant code and see what (if anything) can be done to avoid this behavior. Once you get that reply I'm sure there would be no problem sharing with the class here 😉

Hi Scott, just to double check that this setting is per namespace. If that isn't working, I'd suggest opening a WRC case.

I'm guessing you're running into this limitation "The ObjectScript method used by DTL transformations, GetValueAt, truncates HL7 segment fields at 3.6MB."

Docs cover how to work around this.

https://docs.intersystems.com/irisforhealth20233/csp/docbook/DocBook.UI.Page.cls?KEY=EHL72_transformation#EHL72_transformation_longsegments