That message has always been there if you in fact did not print all of the invoices before posting. Have you checked to make sure the print flag has been unchecked on the invoices? Maybe there is another underlying problem. I found a KB article that engineering was working on from earlier 2019 where the message did not display. Maybe that was the issue in v2017 it did not state what version it was for.

That message has always been there if you in fact did not print all of the invoices before posting. Have you checked to make sure the print flag has been unchecked on the invoices? Maybe there is another underlying problem. I found a KB article that engineering was working on from earlier 2019 where the message did not display. Maybe that was the issue in v2017 it did not state what version it was for.

I can assure you we did not see that message in version 2017. 

However, it's entirely possible that it was "broken" in 2017 and now "fixed" (not the way we want it) in 2019.