Constraint - Comparing two "time" questions

Hi all,

@Grzesiek2010 thank you for providing the solution to this. I have tried using this same constraint, and it works perfectly in the app but for some reason it doesn't seem to work on the web version while I am testing. Please see screenshot below - no matter what time I put in the "End time" it still shows as an error.

image

I used the same constraint you suggested: decimal-date-time(.)>decimal-date-time(../start_time)

Any advice?

Many thanks,

Faran