Newbie How to Set a text box equal to a phrase

Question

I have on a page process
begin
if something<0 then
:P28_DIFFMSG := 'Pkgs needed.';
else
:P28_DIFFMSG := 'Left over pkgs.';
end if;
end;
P28_DIFFMSG is a textbox of 30 characters.
When I run it I always get:
ORA-01008: not all variables bound.
I've tried using v('P28_DIFFMSG') := 'Pkgs needed';
:P28_DIFFMSG := to_char('Pkgs needed');
no luck.
Suggestions?
TIA
Steve

Answer 1

I have just tried something simpler, which is to set the value of a text box named P34_X and the source in the process is just the following one line
:P34_X := 'trouble';
This proves your assignment syntax is correct and it worked for me as various forms of Page Rendering Processes (Before Regions, Before Header etc).
Perhaps you need to look at the if statement - exactly what type of thing is the 'something' you are testing in if something<0 ??