Raise an exception if the external node tagger exits with error.  Added the same logic to the node grouper a while back, realized we need it with the tagger too.
Raise an exception if the external node tagger exits with error.  Added
the same logic to the node grouper a while back, realized we need it
with the tagger too.


etch/etch,etch/etch,etch/etch,etch/etch,etch/etch