Application only working in debug !!

[sjmolloy]

I am using Microsoft Visual Studio 6.0 to build a “simple” C++ application.
Basically, in the dialog box, the user should :
·select an item from a list box
·click on a button
·some processing is done by the application
·the dialog is updated and some text should appear in an edit box that forms part of the dialog.

Unfortunately, when I run this nothing happens when the button is clicked. However, if I step through the code in debug it all works.
Interestingly enough, part of the processing that happens after the button is clicked is a WriteFile( ) operation (application is writing to com ports). I have found that if I put in a message box directly after this with just any old debug message in it tha application then runs. Obviously though I don’t want the user to have to “OK” an extra message box just to get the application to work !!

Anyone got any ideas even what sort of problem I am looking at ?????

 

[Cagliostro]

this can be because of asserts. In release mode they means nothing.
for example
assert(x++);
in debug mode and in release mode are two absolutely different things, because in debug mode it is something like a calling of a function, but in release mode it means only an increment. Ion Filipski

filipski@excite.com

 

[sjmolloy]

Thanks for reply - cause was a number of variables not initialised . The debugger was initialising them by default and spoiling me !!!
Lesson learned !