I am getting the below error in syslog file
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.setup:Setting up http
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event component_loaded[L]: component=http>
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.setup:Setting up api
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.setup:Setting up websocket_api
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event component_loaded[L]: component=websocket_api>
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event component_loaded[L]: component=api>
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.setup:Setting up frontend
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.setup:Setting up recorder
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event component_loaded[L]: component=frontend>
May 1 21:35:35 hassbian hass[3785]: Exception in thread Recorder:
May 1 21:35:35 hassbian hass[3785]: Traceback (most recent call last):
May 1 21:35:35 hassbian hass[3785]: File “/usr/lib/python3.4/threading.py”, line 920, in _bootstrap_inner
May 1 21:35:35 hassbian hass[3785]: self.run()
May 1 21:35:35 hassbian hass[3785]: File “/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/recorder/init.py”, line 155, in run
May 1 21:35:35 hassbian hass[3785]: from .models import States, Events
May 1 21:35:35 hassbian hass[3785]: File “/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/recorder/models.py”, line 7, in
May 1 21:35:35 hassbian hass[3785]: from sqlalchemy import (Boolean, Column, DateTime, ForeignKey, Index, Integer,
May 1 21:35:35 hassbian hass[3785]: ImportError: cannot import name ‘Boolean’
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event service_registered[L]: service=publish, domain=mqtt>
May 1 21:35:35 hassbian hass[3785]: INFO:homeassistant.core:Bus:Handling <Event component_loaded[L]: component=mqtt>
May 1 21:35:45 hassbian hass[3785]: WARNING:homeassistant.setup:Setup of recorder is taking over 10 seconds.
(END)
Same issue here I had to downgrade to 0.40
The error in question indicates that something either went bad with you installation or that you have an error in your configuration. Would recommend posting in the configuration part of the forum since this most likely isn’t related to hassbian 
Hey, i got the same problem here. Just did an clean update… Running “hass --script check_config” works perfectly.
Jul 03 22:04:16 raspi-server hass[2020]: 2017-07-03 22:04:16 INFO (MainThread) [homeassistant.setup] Setting up recorder
Jul 03 22:04:16 raspi-server hass[2020]: 2017-07-03 22:04:16 INFO (MainThread) [homeassistant.setup] Setup of domain frontend took 0.0 seconds.
Jul 03 22:04:16 raspi-server hass[2020]: 2017-07-03 22:04:16 INFO (MainThread) [homeassistant.core] Bus:Handling <Event component_loaded[L]: component=frontend>
Jul 03 22:04:26 raspi-server hass[2020]: Exception in thread Recorder:
Jul 03 22:04:26 raspi-server hass[2020]: Traceback (most recent call last):
Jul 03 22:04:26 raspi-server hass[2020]: File “/usr/lib/python3.4/threading.py”, line 920, in _bootstrap_inner
Jul 03 22:04:26 raspi-server hass[2020]: self.run()
Jul 03 22:04:26 raspi-server hass[2020]: File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/recorder/init.py”, line 159, in run
Jul 03 22:04:26 raspi-server hass[2020]: from .models import States, Events
Jul 03 22:04:26 raspi-server hass[2020]: File “/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/recorder/models.py”, line 6, in
Jul 03 22:04:26 raspi-server hass[2020]: from sqlalchemy import (
Jul 03 22:04:26 raspi-server hass[2020]: ImportError: cannot import name ‘Boolean’
Jul 03 22:04:26 raspi-server hass[2020]: 2017-07-03 22:04:26 WARNING (MainThread) [homeassistant.setup] Setup of recorder is taking over 10 seconds.
Any idea?