panic kern exec 3 error need help

[urban37]

Hi,

I am getting panic kern exe 3 error when I ran the debugger.
Is there a way to fix this?


TBool CmShareMainView::HandleLoginMenuItemSelectedL( TInt aCommand )
{
// TODO: implement selected event handler


CMShareMain* text2 = new CMShareMain() ;



// TInt length=text2->iUsernameTextBox->TextLength();

HBufC* buffer = HBufC::NewLC(165);
TPtr ptr = buffer->Des();



text2->iUsernameTextBox->GetText( ptr );//crashes here at this line

//text2->iUsernameTextBox->SetTextL( &ptr );



CleanupStack::PopAndDestroy(buffer);

[symbianyucca]

Basically check that all pointers are actually non-NULL, and they do point to some real object.

[urban37]

How would I make it non-null?

I am trying to make it point to a textbox and get the texbox content from whatever the user types in it.

The textbox is created from carbide UI designer so a lot of the code is auto generated.

[symbianyucca]

basically see that the "text2" is constructed fully, and that the "iUsernameTextBox" is also fully constructed.

Basically it is your own code, and you need to see that you actually make all stuff correctly, before trying to utilize them in the code.

[vasant21]

My guess is that iUsernameTextBox is NULL.

[urban37]

Actually yes iUsernameTextBox is null.

Thanks for that suggestion and I will try that out and see what happens.

Where did the code you suggested go?

[heuven]

Hi,

The name iUsernameTextBox suggests iUsernameTextBox is a data member of CmShareMainView (convention: data members start with lowercase i). Child objects (data member which are pointers) are created in the 2nd phase of the construction, i.e. ConstructL().

Pls, check if iUsernameTextBox is created in CmShareMainView::ConstructL(). If not, create it there and make sure (by debugging step-by-step) the pointer is not NULL.

If problems persists, pls, post all your code here. Also take a look at basic Symbian training - e.g. http://www.forum.nokia.com/info/sw.n..._Workbook.html to make yourself familiar with cleanup stack and two phase construction.

BR,

Rene

[urban37]

Hi,

This is where iUsernameTextBox is:
I want to use the textbox in the CMShareMainView.cpp file

But the textbox is created from there from the UI designer

I am trying to create a login screen.
CMShareMain::CMShareMain()
{
// [[[ begin generated region: do not modify [Generated Contents]
iImage1 = NULL;
iUsernameLabel = NULL;
iPasswordLabel = NULL;
iUsernameTextBox = NULL;
iPasswordTextBox = NULL;
// ]]] end generated region [Generated Contents]

}

[niyaz.khan]

Hi,
First create object of the text box then only u can use it
(text->). If u use object without creating the object it will definitly show Kern EXEC-3 panic. Look at the code in more detail.

[urban37]

Do you mean something like this ?


TBool CmShareMainView::HandleLoginMenuItemSelectedL( TInt aCommand ){
CMShareMain* text2 = new CMShareMain() ;

text2->iUsernameTextBox;
}

[heuven]

Hi,

Pls, post your full code as a .zip attachment to this thread. And look in CmShareMainView::ConstructL() if iUsernameTextBox gets created.

Pls, check if iUsernameTextBox is created in CmShareMainView::ConstructL(). If not, create it there and make sure (by debugging step-by-step) the pointer is not NULL.

BR,

Rene

[urban37]

Hi,

It said I am not allow to post attachments.

Can I email it to you?

It is probably more clear if you see the whole code.

I also tried putting iUsernameTextBox in ::constructL but I get undefined identifier.

[r_heuven]

OK - you can email the code. The mail address is rene@inmote.com. You should be able to create a .zip file and upload it to the forum (in the new forum I already did this one time).

BR,

Rene

[urban37]

Under posting rules it says I can not post attachments.