[news.eclipse.newcomer] Diagnostics being swallowed - how to see details

[benedict heal <bh@xxxxxxxxxxxxxxxx>]

I'm writing an editor.
It initialises OK (gets to the end of the init() method), but when I 
open a document, it displays on the console:

	Unhandled event loop exception
	Reason:
	Failed to execute runnable (java.lang.NoClassDefFoundError)

There is no stack trace, so I can't tell where it is having problems.

Is there any way of suppressing/changing the  Eclipse error handling so 
I can see the entire exception?
Or is there some other suitable debugging technique to solve such problems?

Many thanks,
Benedict