[news.eclipse.modeling.gmf] Anyone knows this horrific Error of a gmf-ba

["Derry" <dfx_2006@xxxxxxxxxxx>]

Hi, everyone:
I made a editor based on GMF, I can use create a file, when I reopen the 
file, I can't create any new element on the canvas when I encounter a 
workbench error, anyone know what happened?

Error log:

Error
Thu Jul 03 09:41:39 CST 2008
Unhandled event loop exception

java.lang.StackOverflowError
at 
org.eclipse.core.runtime.ProgressMonitorWrapper.internalWorked(ProgressMonitorWrapper.java:94)
at 
org.eclipse.core.runtime.SubProgressMonitor.internalWorked(SubProgressMonitor.java:155)
at 
org.eclipse.core.runtime.ProgressMonitorWrapper.internalWorked(ProgressMonitorWrapper.java:94)
at 
org.eclipse.core.runtime.SubProgressMonitor.internalWorked(SubProgressMonitor.java:155)
......(and so on)

Thanks
derry