[Newbies] Debugging - any hints, tutorials ?

Hi,

I'm having issues using the debugger when I am trying to debug errors when I am using a third party API's. Typically, it's because I'm making errors when trying to use a third party component. The debugger errors are usually totally opaque to me, for example I'm getting this when using a scripitilious component:

BlockClosure(Object)>>error: BlockClosure>>numArgsError: BlockClosure>>value: SUTreeReportColumn>>render:on: [] in [] in SUTreeReportColumn>>render:indent:on: BlockClosure>>renderOn: WARenderCanvas(WARenderer)>>render: WARenderCanvas(WACanvas)>>render: [] in WADivTag(WATagBrush)>>with: BlockClosure>>renderOn: WARenderCanvas(WARenderer)>>render: WARenderCanvas(WACanvas)>>render: WARenderCanvas(WACanvas)>>nest: WADivTag(WABrush)>>with: WADivTag(WATagBrush)>>with: [] in SUTreeReportColumn>>render:indent:on: BlockClosure>>renderOn: WARenderCanvas(WARenderer)>>render: WARenderCanvas(WACanvas)>>render: [] in WADivTag(WATagBrush)>>with:

In the above I can't see anywhere which references a line in my code, consequently I'm finding it hard to proceed.

Are there any tutorials or hints on how best to use the debugger ?

Thanks.