Hello dev-team, I am trying to upgrade our production instance to the latest release (to galaxy-dist) , somehow I am not able to restart the instance. Here is the log message I found: File "./scripts/paster.py", line 35, in <module> serve.run() File "galaxy-prod-repo/lib/galaxy/util/pastescript/serve.py", line 1049, in run invoke(command, command_name, options, args[1:]) File "galaxy-prod-repo/lib/galaxy/util/pastescript/serve.py", line 1055, in invoke exit_code = runner.run(args) File "galaxy-prod-repo/lib/galaxy/util/pastescript/serve.py", line 220, in run result = self.command() File "galaxy-prod-repo/lib/galaxy/util/pastescript/serve.py", line 643, in command app = loadapp( app_spec, name=app_name, relative_to=base, global_conf=vars) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 350, in loadapp return loadobj(APP, uri, name=name, **kw) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 374, in loadobj global_conf=global_conf) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 399, in loadcontext global_conf=global_conf) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 423, in _loadconfig return loader.get_context(object_type, name, global_conf) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 561, in get_context section) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 620, in _context_from_explicit value = import_string(found_expr) File "galaxy-prod-repo/lib/galaxy/util/pastescript/loadwsgi.py", line 125, in import_string return pkg_resources.EntryPoint.parse("x=" + s).load(False) File "galaxy-prod-repo/lib/pkg_resources.py", line 1954, in load entry = __import__(self.module_name, globals(),globals(), ['__name__']) File "galaxy-prod-repo/lib/galaxy/web/buildapp.py", line 3, in <module> from galaxy.webapps.galaxy.buildapp import app_factory File "galaxy-prod-repo/lib/galaxy/webapps/galaxy/buildapp.py", line 18, in <module> import galaxy.model.mapping File "galaxy-prod-repo/lib/galaxy/model/mapping.py", line 943, in <module> Column( "user_id", Integer, ForeignKey( "galaxy_user.id" ), index=True ) AttributeError: 'module' object has no attribute 'DataManagerHistoryAssociation' Removing PID file paster.pid I am not clear about the error message here. any idea thank you, --/Vipin cBio MSKCC Ratsch Lab