Module weberror.evalexception.middleware:364 in respond
>> app_iter = self.application(environ, detect_start_response)

Module paste.debug.prints:98 in __call__
>> environ, self.app)

Module paste.wsgilib:539 in intercept_output
>> app_iter = application(environ, replacement_start_response)

Module paste.recursive:80 in __call__
>> return self.application(environ, start_response)

Module paste.httpexceptions:632 in __call__
>> return self.application(environ, start_response)

Module galaxy.web.framework.base:160 in __call__
>> body = method( trans, **kwargs )

Module galaxy.web.framework:67 in decorator
>> return simplejson.dumps( func( self, trans, *args, **kwargs ) )

Module galaxy.web.controllers.workflow:706 in editor_form_post
>> 'tool_state': incoming.pop("tool_state")

Module galaxy.workflow.modules:363 in from_dict
>> assert type in self.module_types

AssertionError:
[]

And when I added an annotation/notes, and I wanted to save this work flow, I got the same error.

Any idea?

Thanks!
Yufei