Crash on closing DB due to cursor not nil

[Ruslan Zasukhin]

On 25/4/07 10:24 PM, "Steve Albin" <steve at steve-albin.com> wrote:

Hi Steve,

> I'm using RB2007r2 with V4RB 2.5.9.  I've come across a situation where my app
> crashes on shutdown if I don't set a cursor to nil first.
> 
> Here is my code for the close event in my app class:
>       
>   self.CloseWindows    // close all windows that may be open
>   if DBfile <> nil then   // DBfile is class VDatabase
>     self.DBfile.Flush
>     self.DBfile = nil
>   end if 
>   Valentina.ShutDown
> 
> 
> This works fine unless I do one particular function in a global module where I
> declare a VCursor as global.  If I don't specifically set the VCursor to nil,
> the app crashes above where I set DBfile to nil.
> 
> I have many VCursors declared in my windows, so I suppose the routine I use to
> close the windows solves this problem.
> 
> I was under the impression that it was not necessary to set each cursor to nil
> before setting the DB to nil.  Has something changed or was I misinformed?
> 
> If this is a bug, I will set up a project and report it.  But, I have a
> perfect workaround for my app.

Yes we fight against such crashes...
E.g. TEST project exactly have similar tests I think.

And may be you have discover one more special case.
Hard to say. It needs to get on hands project.

-- 
Best regards,

Ruslan Zasukhin
VP Engineering and New Technology
Paradigma Software, Inc

Valentina - Joining Worlds of Information
http://www.paradigmasoft.com

[I feel the need: the need for speed]