Hi, I am getting an error page when I try to open the bowtie2 tool page (after selecting older version 0.2 a54de7e658f7 from drop down on version 0.3 c1ec08cb34f9 page). URL: http://....../tool_runner/index File '/home/galaxy/galaxy-dist/eggs/WebError-0.8a-py2.6.egg/weberror/evalexception/middleware.py', line 364 in respond app_iter = self.application(environ, detect_start_response) File '/home/galaxy/galaxy-dist/eggs/Paste-1.7.5.1-py2.6.egg/paste/recursive.py', line 84 in __call__ return self.application(environ, start_response) File '/home/galaxy/galaxy-dist/lib/galaxy/web/framework/middleware/remoteuser.py', line 107 in __call__ return self.app( environ, start_response ) File '/home/galaxy/galaxy-dist/eggs/Paste-1.7.5.1-py2.6.egg/paste/httpexceptions.py', line 633 in __call__ return self.application(environ, start_response) File '/home/galaxy/galaxy-dist/lib/galaxy/web/framework/base.py', line 132 in __call__ return self.handle_request( environ, start_response ) File '/home/galaxy/galaxy-dist/lib/galaxy/web/framework/base.py', line 190 in handle_request body = method( trans, **kwargs ) File '/home/galaxy/galaxy-dist/lib/galaxy/webapps/galaxy/controllers/tool_runner.py', line 90 in index template, vars = tool.handle_input( trans, params.__dict__ ) File '/home/galaxy/galaxy-dist/lib/galaxy/tools/__init__.py', line 2136 in handle_input errors, params = self.__check_param_values( trans, expanded_incoming, expanded_state, old_errors, process_state, history=history, source=source ) File '/home/galaxy/galaxy-dist/lib/galaxy/tools/__init__.py', line 2251 in __check_param_values errors = self.update_state( trans, inputs, state.inputs, incoming, old_errors=old_errors or {}, source=source ) File '/home/galaxy/galaxy-dist/lib/galaxy/tools/__init__.py', line 2514 in update_state group_state = state[input.name] KeyError: 'params' I can't see anything that gives me a clue where to investigate further, hopefully someone here knows? I have tried updating to latest changeset, and have restarted a few times, but still the same error. Thanks in advance for help Anna