I am using SS 2.0 and setting all date fields using native JavaScript date objects, as I do in every other script. I'm doing this in a User Event script, so it can't be triggering any other scripts.

Some date fields need some specific format, that exactly what that error is. Date Fields as many others in NetSuite are not 100% consistent across the system all the time.

That's my challenge. On one hand, I've never seen any date field in SS2.0 being set any other way besides a native JavaScript date object (unless you are using submitFields). On the other hand, if it DOES require something different -- I have no idea which field it is talking about. And finally, it seems to be suggesting that I'm currently giving it a value of null. I looked at every possible date field on that record, and I don't see it. I think I will have to open a ticket for it.

Install NetSuite Field Explorer & dump an already saved record. Have a look at it and see if there’s any date fields that you’re not setting in your script

I did. That's how I found every potential date field, and I'm setting them all.

Good luck with your ticket 😞 Not fun

I have found the new Subscription subsystem to be extremely frustrating to work with. Far too many things don't work consistently, or are not documented.

Try using setText instead of setValue

can you use setText on DATE fields?

setText is for setting it via a string like 01/01/20

I understand ... I just didn't think you could use setText on anything other than select fields

you can also use it to set percentages on discounts