Panic E32 USER -CBase 21

[devdattac]

Hi All,
I am developing an application in that panic e32 user cbase21 arises .In my application I am using list box.While handelling list box event only item at index 0 is accessible when click on other item index panic occurs.I am developing application in s60 5th edition sdk.
my code is...

iListBox = new (ELeave) CAknDoubleLargeStyleListBox();

        // Construct listbox 

        iListBox->ConstructL( this, EAknListBoxSelectionList | EAknListBoxLoopScrolling );

        iListBox->SetContainerWindowL( *this );

        // Set scrollbars

        iListBox->CreateScrollBarFrameL( ETrue );

        iListBox->ScrollBarFrame()->SetScrollBarVisibilityL( CEikScrollBarFrame::EOn, CEikScrollBarFrame::EAuto );   
        
        // Create listbox item array

        iListBoxItems = new (ELeave) CDesCArrayFlat(6);

        // Create listbox items

        iListBoxItems->AppendL( _L("0\titem0\t") );
        iListBoxItems->AppendL( _L("1\titem1\t") );
        iListBoxItems->AppendL( _L("2\titem2\t") );
        iListBoxItems->AppendL( _L("3\titem3\t") );
        iListBoxItems->AppendL( _L("4\titem4\t") );
        iListBoxItems->AppendL( _L("5\titem5\t") );

        // Add items to listbox

        iListBox->Model()->SetItemTextArray( iListBoxItems );

        // Listbox deletes the item array

        iListBox->Model()->SetOwnershipType( ELbmOwnsItemArray );
        iListBox->HandleItemAdditionL( );
        
        //To get event in HandleListBoxEventL()
        //Do not forgot to add it..........
        iListBox->SetListBoxObserver(this);
        // Add icons to listbox

        AddListboxIconsL();

        // Activate Listbox
        iListBox->SetRect( Rect() );
        iListBox->ActivateL();

In HandleListBoxEventL function....

if ( aEventType == EEventEnterKeyPressed || aEventType == EEventItemDoubleClicked)
   	     {
   	     	TInt Index = iListBox->CurrentItemIndex();
   	     	
   	     	switch (Index)
   	          {
   	    	 	case 0: 
   	    	 		{
   	    	 				CAknInformationNote* informationNote;
	 	            	   informationNote = new ( ELeave ) CAknInformationNote;
	 	            	   informationNote->ExecuteLD(_L("item0 Selected"));
	 	            	 
   	    	 		}
   	    	 	break;
   	    	 	case 1:
   	    	 	CAknInformationNote* informationNote;
   	    	 	informationNote = new ( ELeave ) CAknInformationNote;
   	    	 	informationNote->ExecuteLD(_L("index1 Selected"));
   	                  break;
   	    	 	case 2: 
   	    	 	CAknInformationNote* informationNote2;
   	    	 		 	            	   informationNote2 = new ( ELeave ) CAknInformationNote;
   	    	 		 	            	   informationNote2->ExecuteLD(_L("index2 Selected"));
   	    	          break;
	   	    	case 3: 
	   	    		CAknInformationNote* informationNote3;
	   	    			 	            	   informationNote3 = new ( ELeave ) CAknInformationNote;
	   	    			 	            	   informationNote3->ExecuteLD(_L("index3 Selected"));
	   	    	      break;
	   	    	case 4: 
	   	    		CAknInformationNote* informationNote4;
	   	    			 	            	   informationNote4= new ( ELeave ) CAknInformationNote;
	   	    			 	            	   informationNote4->ExecuteLD(_L("index4 Selected"));
	   	    	      break;
	    	 	case 5: 
	    	 		CAknInformationNote* informationNote5;
	    	 			 	            	   informationNote5 = new ( ELeave ) CAknInformationNote;
	    	 			 	            	   informationNote5->ExecuteLD(_L("index5 Selected"));
                    break;
                default:
                    // Do default handling here…
            	   CAknInformationNote* informationNote1;
            	   informationNote1 = new ( ELeave ) CAknInformationNote;
            	   informationNote1->ExecuteLD(_L("default Selected"));
                   break;
               }
          }

please help me ASAP....
Thanx...

[sriky27]

Hi,

I would suggest you to go through this document and check your array usage in your listbox code.

[devdattac]

Hi,

I would suggest you to go through this document and check your array usage in your listbox code.

Thanx 4 reply sriky,
but my problem is not solved yet.Is there any problem in my code please check it.let me know soon..

[wizard_hu_]

Since you are using 5th edition, it is pretty probable that you are using the emulator, so you could debug your code. Enable Just In Time debugging in the emulator preferences, and start your code in debug mode. Carbide will show you where the panic occurs.

[devdattac]

Thanx 4 help to all,
my problem is not solved ...
I check just in time debugging option in emulator but as my debugger in IDE not support it I not able trace the panic where it occurs.

[kiran10182]

If you open the SDK help and search for the the error, you might have found the description.

Anyways here it goes:

E32 USER -CBase 21
This panic is raised by any operation which accesses an element of an array by explicit reference to an index number, for example, the Delete(), InsertL() and At() member functions or the operator Operator[]. It is caused by specifying an index value which is either negative or is greater than or equal to the number of objects currently within the array.

Anyways from the given code snippet, I cannot figure out why does it occur in this piece of code. Are you manipulating it the listbox somewhere else in your program?

As far as your final reply is concerned, I do not get your point. If you just set Just-in-time debugging option from your Emulator->Preferences then it should give you last known position of the problem in debugging.

Finally Listbox manipulation works apparently fine for me in S60 5th edition as it should.