List Box error:out of range

[DavidNI]

Hi everyone:

   Thank you for your attention.

I am using List Box Control to display test information, but occur error, the hint is out of index range.

I list part relative code for you, maybe you can find some clues and help me .

//====================================================

#define TEST_STATUS_MAX_SIZE ((long) 102400)  

long GUI_TestStatus_Write (char *svalue_in)
{
 long lreturn = GUI_ERR_NONE;
 int ilist_item_count = 0;
 
 if (iMainPanelHandle > 0)
 {
      lreturn = (long) GetNumListItems (iMainPanelHandle, MAINPANEL_LISTBOX_TESTSTATUS, &ilist_item_count);
      if ( ilist_item_count > TEST_STATUS_MAX_SIZE )
      { //max data allowed exceeded. clear window.
               lreturn = (long) ClearListCtrl (iMainPanelHandle, MAINPANEL_LISTBOX_TESTSTATUS);  
      }
  
       lreturn = (long) InsertListItem (iMainPanelHandle, MAINPANEL_LISTBOX_TESTSTATUS, -1, svalue_in, 0);
     if (AUTOSCROLL_ENABLE == iAutoScroll)
     {  
               if (ilist_item_count >= 1)
               {
                 lreturn = (long) SetCtrlIndex (iMainPanelHandle, MAINPANEL_LISTBOX_TESTSTATUS, (ilist_item_count-1));
               }
       }
 }
 return lreturn;
}

//====================================================

the system break down in SetCtrlIndex (), i do not know how to resolve it

Thank you in advance!

[RobertoBozzolo]

Are you getting this error consistently or some times only? I'm asking you because when you clear yor listbox because of max data limit exceeded, you should reset  ilist_item_count variable to zero, and you aren't: in this case, when you set listbox position with SetCtrlindex you are pointing to an element that no longer exists.