Dynamic CAknPopupFieldText n KERN-EXEC 3

[Shilpa13]

Hi All!

I am creating the dynamic form with edwins n popup texts.
It works fine except with problems related to the dynamic popup texts on exit.

I used following code for displaying it...

CCoeControl* myGroupPopupControl = CreateLineByTypeL(_L("Friend"),ActivePageId(), iItemId, EAknCtPopupFieldText, NULL) ;
CAknPopupFieldText* myGroupPopup = STATIC_CAST(CAknPopupFieldText*, myGroupPopupControl) ;
TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader,R_SEARCH_FORM_POPUP);
myGroupPopup->ConstructFromResourceL(reader);
CleanupStack::PopAndDestroy(); //reader
CAknPopupField* popup = STATIC_CAST(CAknPopupField*, ControlOrNull( iItemId));
CDesCArray* itemarray = new (ELeave) CDesCArrayFlat( 6 );

itemarray->AppendL(_L("Test1"));
itemarray->AppendL(_L("Test2"));

CAknQueryValueTextArray* textArray = CAknQueryValueTextArray::NewLC();
// iQueryValText is member variable
textArray->SetArray( *itemarray );
iQueryValText = CAknQueryValueText::NewLC();
iQueryValText->SetArrayL( textArray );
iQueryValText->SetCurrentValueIndex( 0 );
popup->SetQueryValueL( iQueryValText );

Line(iItemId)->SetTakesEnterKey(ETrue);
Line(iItemId)->SetOfferHotKeys(ETrue);

If i create dynamic form excluding the dynamic popup it works fine on exit too.
But when i add dynamic popup to form, it displays it properly.. gives me entered data back properly..but on exit it crashes with Kern Exec-3 panic without going to destructor.

It goes to appUi's HandleCommandL and crashes at Exit() call without leaving any traces back

case EEikCmdExit:
case EAknSoftkeyExit:
{
Exit();// crashes at this point
}
break;

Any pointers regarding this will be highly appreciated.

Thanks.

[mayur_24]

Seems to be an issue of ownership.
Mostly double-deletion or invalid references to already deleted pointers can be one of the reasons.
Check who has the ownership of the popup form and make sure the deletions are done properly.
--Mayur.

[erst]

I also get KERN-EXEC 3 when creating popup fields with CreateLineByTypeL().
I found this stating it as a bug: http://discussion.forum.nokia.com/fo...t=83679&page=3

I guess the only work around is to define all popup fields in the .rss file. Then change the contents if needed. This doesn't solve if you need a dynamic number of popup fields though.

[Shilpa13]

I also get KERN-EXEC 3 when creating popup fields with CreateLineByTypeL().
I found this stating it as a bug: http://discussion.forum.nokia.com/fo...t=83679&page=3

I guess the only work around is to define all popup fields in the .rss file. Then change the contents if needed. This doesn't solve if you need a dynamic number of popup fields though.

Well.. Its NOT a bug.
Its an ownership issue with CAknForm n dynamic popup created with CreateLineByTypeL.

I had cleared that bug long back actually.. :)

See aknpopupfieldtext.h

In the bottom of that header

private:
// the following members are owned
CDesCArray* iArray; // the array of text items
CAknQueryValueTextArray* iTextArray;
CAknQueryValueText* iTextValue;

So need to take care of CAknQueryValueText* , SetArrayL (which is set to CAknQueryValueTextArray*) and CAknQueryValueText* (which takes CAknQueryValueTextArray* in its SetArrayL function)

It works fine.

[Shilpa13]

Well.. Its NOT a bug.
Its an ownership issue with CAknForm n dynamic popup created with CreateLineByTypeL.

I had cleared that bug long back actually.. :)

See aknpopupfieldtext.h
In the bottom of that header

private:
// the following members are owned
CDesCArray* iArray; // the array of text items
CAknQueryValueTextArray* iTextArray;
CAknQueryValueText* iTextValue;

So need to take care of CDesCArray* (which is set to CAknQueryValueTextArray*) and CAknQueryValueText* (which takes CAknQueryValueTextArray* in its SetArrayL function)

It works fine.

[mwiechnik]

Hi,
now I have been facing this problem since yesterday and today I found that it is what you Shilpa13 had. Could you or someone please give me a wider clue what to do with it.

In S60 API it says that only CAknQueryValueTextArray gets the ownership. CAknQueryValueText does not become the owner and nor CAknPopupField.

textArray = CAknQueryValueTextArray::NewLC();
textArray->SetArray( *iUnitArray );

.. so I don't delete iUnitArray because it is going to be done by CAknQueryValueTextArray allegedly.
Everything works fine, until I close the application where I get KERN-EXEC 3.
How can I solve it?

Thanks for any help.


OK I have finally solved it!:)
In my case I made textArray a class variable iTextArray and in the destructor I deleted it along with iQueryValueText. Of course beforehand yet where I initialized the pointers I popped the objects off the cleanup stack (..NewLC..).

Now it works.