yep, tested in 8.4 2018-07-26 with no hals, single contract with 3 lines. The contract was never unOKed. Only the first line gets invoiced, all other lines are never invoiced. Will try to report a bug.
Hello,
We also have a customer on windows who is on 2026-02-28 having the exact same error message after updating.
The title of the messagebox is in our case is: "C:\Program Files(x86)\Han...