To clarify catList is the dataprovider for a combobox whose id is courseCat. So I am reading in an xml file of course categories and then adding a 'None' choice to the list that will be its'default' selection.
thanks, hoyt --- In flexcoders@yahoogroups.com, "hoytlee2000" <[EMAIL PROTECTED]> wrote: > > private function configHandler(evt:ResultEvent):void { > catList = evt.result.config.categories.cat; > catList.addItemAt('None', 0); > courseCat.selectedIndex = 0; > } > > > this is line 299: courseCat.selectedIndex = 0; > > > thanks, > hoyt > > --- In flexcoders@yahoogroups.com, "Alex Harui" <aharui@> wrote: > > > > What is the code at courseInfo.mxml at line 299? > > > > > > > > ________________________________ > > > > From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On > > Behalf Of hoytlee2000 > > Sent: Wednesday, May 07, 2008 10:11 PM > > To: flexcoders@yahoogroups.com > > Subject: [flexcoders] need help deciphering error message > > > > > > > > Hello, > > > > I get the error message below when I am running my application, > > however it runs fine when I click continue. There isn't an error when > > I compile in Flex builder. I checked the function that references the > > object and they are all defined and the objects exist. > > > > The only thing I can think of is that the object that is referenced in > > the function isn't displayed on the application startup (its on the > > second canvas of a view stack) so it throws this error, however when I > > move the call to the function to execute only when the second canvas > > is displayed I still get the error. > > > > I'm sure its a common error that many newbies must hit. I appreciate > > any clues to look for in the code. > > > > Thanks, > > Hoyt > > > > TypeError: Error #1009: Cannot access a property or method of a null > > object reference. > > > > at > > courseInfo/configHandler()[/Users/hoytng/Sites/pdiCMS/CourseMgmtSystem/c > > ourseInfo/src/courseInfo.mxml:299] > > at > > courseInfo/__courseCatHTTP_result()[/Users/hoytng/Sites/pdiCMS/CourseMgm > > tSystem/courseInfo/src/courseInfo.mxml:429] > > >