Form update with Confirm statement

In the OnValidate of a field I use the Confirm statement to check if the value in the field may be changed or not : if Confirm("…",true) then value := i; This code works fine in NF 2.60, but don’t seem to work in Attain 3.01.A. I’ve tried to put currform.update all over the place but nothing works. The strange thing is, that when I remove the Confirm statement the form updates fine. Has anyone encountered the same problem and is there a solution to this ? Thanks for helping me on this