Changed to use standard error machinery.

The previous non-standard machinery didn't like
error instances.

lib/python/Products/ExternalMethod/ExternalMethod.py

@@ -234,7 +234,6 @@ class ExternalMethod(OFS.SimpleItem.Item, Persistent, Explicit,
 
         __traceback_info__=args, kw, self.func_defaults
 
-        try:
         try:
             try: return apply(f,args,kw)
             except TypeError, v:
@@ -248,28 +247,7 @@ class ExternalMethod(OFS.SimpleItem.Item, Persistent, Explicit,
                     raise TypeError, v, tb
                 finally: tb=None
         except:
-                error_type=sys.exc_type
-                error_value=sys.exc_value
-                tb=sys.exc_traceback
-                if lower(error_type) in ('redirect',):
-                    raise error_type, error_value, tb
-                if (type(error_value) is type('') and
-                    regex.search('[a-zA-Z]>', error_value) > 0):
-                    error_message=error_value
-                else:
-                    error_message=''
-                error_tb=pretty_tb(error_type, error_value, tb)
-                c=self.aq_parent
-                try:
-                    s=getattr(c, 'standard_error_message')
-                    v=HTML.__call__(s, c, self.aq_acquire('REQUEST'),
-                                    error_type=error_type,
-                                    error_value=error_value,
-                                    error_tb=error_tb, error_traceback=error_tb,
-                                    error_message=error_message)
-                except: v='Sorry, an error occured'
-                raise error_type, v, tb
-        finally: tb=None
+            self.raise_standardErrorMessage()
                 
 
     def function(self): return self._function