Acknowledge message keeps appearing

Question

I am using Forms 9.0.4.0.19 on WinXP against DB 9.2.0.7
I created a very simple form with one push button item. I added a when-button-pressed trigger which does the following (nothing !)
DELCARE
BEGIN
NULL;
END;
So on pressing the button I would expect nothing to happen at all. However, on pressing the button I get the Forms popup "Please acknowledge the message".
There is no message in the popup box or on the status line. Even if I add some meaningful code to this trigger I still keep getting the popup box.
I created a simple form to test this as I am having the same issues with Forms applications that I moved from 6i and not just on pressing buttons but on startup, executing queries, in fact all over the place I keep getting this "acknowledge messge" popup but with no corresponding message or error of any sort. After acknowledging the process continues as expected.
Has anyone had this problem before ? If I try to set a breakpoint to debug this in the when-button-pressed trigger, the popup appears before the breakpoint is reached.
Any help much appreciated
Shaq

Answer 1

Very simple, in Edit>Preferences>runtime the debug messages box was checked. It shouldn't be.
Shaq