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Flex 4.6 -- how to debug runtime errors

I'm teaching myself Adobe Flex 4.6 (FlashBuilder) and am picking up the coding method fine, but having trouble when I hit a runtime error.

For example, I have an app on a tabbed control that has a datagrid on each tab pulling MySQL data for display. Rather than having all this code in the main file, I created separate components for each datagrid and dropped them into each tab.

Everything worked fine until I converted the last datagrid display into a component and put it on the top tab and removed the corresponding code in the main file. That grid displays properly, but now when I click on any of the other tabs to show those grids I get the following runtime error:

ReferenceError: Error #1065: Variable _Componenets_teacherGridWatcherSetupUtil is not defined.
      at global/flash.utils::getDefinitionByName()
      at Componenets::teacherGrid()[C:\Users\Gary\Adobe Flash Builder 4.6\FlexPHPMysqlUpdateAdv\src\Componenets\teacherGrid.mxml:4]
      at mx.core::Container/createComponentFromDescriptor()[E:\dev\4.y\frameworks\projects\mx\src\mx\core\Container.as:4294]
      at mx.core::Container/createComponentsFromDescriptors()[E:\dev\4.y\frameworks\projects\mx\src\mx\core\Container.as:4183]
      at mx.core::Container/createDeferredContent()[E:\dev\4.y\frameworks\projects\mx\src\mx\core\Container.as:4214]
      at mx.containers::ViewStack/instantiateSelectedChild()[E:\dev\4.y\frameworks\projects\mx\src\mx\containers\ViewStack.as:1260]
      at mx.containers::ViewStack/commitProperties()[E:\dev\4.y\frameworks\projects\mx\src\mx\containers\ViewStack.as:756]
      at mx.containers::TabNavigator/commitProperties()[E:\dev\4.y\frameworks\projects\mx\src\mx\containers\TabNavigator.as:566]
      at mx.core::UIComponent/validateProperties()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:8219]
      at mx.managers::LayoutManager/validateProperties()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:597]
      at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:813]
      at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.y\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1180]

Not sure how to begin debugging this and any help on this specific error, or on runtime debugging in Flex would be appreciated.

Thanks,

Gary

gdejarnett

ASKER

Following up, I found that the problem was that I didn’t have the as3corelib in my build path.

I'm not getting this error now, but if I could get some good advice on how to debug runtime errors here, I'll still award the points.

Also if there are any Flashbuilder settings I should change (that are not already set by default) to avoid runtime errors, please let me know.

Thanks,

Gary

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gdejarnett

ASKER

Thanks for the suggestion.

Yes, I do use the debugger, but my problem is that when I would run it before deploying, it would run cleanly.

I'll look more into the try/catch blocks though and see if I can bring it to the surface that way.

Thanks again for taking the time to help,

Gary