date-diff question

[Dave]

I'm trying to incorporate date-diff into my system.

This works:

There are <<day-diff 2019 02 20 2019 03 22>> days until lift-off

giving 32 days, but this

There are <<day-diff {{mynow!!mynow2}} {{!!due2}}>> days until lift-off

doesn't. 

I also tried single "{" and  "}", as well as "$(" and ")$" to no avail..., as well as <$wikify><<day-diff {{mynow!!mynow2}} {{!!due2}}>></$wikify> and <$wikify <<day-diff {{mynow!!mynow2}} {{!!due2}}>>\>

Any suggestions?

Thanks,

- Dave

BTW, its from here: https://ooktech.com/jed/ExampleWikis/DateMacros/

[Dave]

To be clear, the fields above do have the proper date formats "2019 02 20"  and "2019 03 22"