I'm running weewx (V 3.5.0) on a Rpi3b. For months it's been running fine. 
The other day I had a data spike and attempted to read the weewx.sdb file 
as per the weewx guide instructions. ( Spikes in the graph) A few hours 
later I noticed It was not working...
from looking at the system log I'm wondering if I somehow messed up the sdb 
file?

I'm getting the following system log report:


Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Initializing engine
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading station type 
FineOffsetUSB (weewx.drivers.fousb)
Dec  1 10:47:53 WXraspberrypi weewx[3120]: fousb: driver version is 1.8
Dec  1 10:47:53 WXraspberrypi weewx[3120]: fousb: polling mode is PERIODIC
Dec  1 10:47:53 WXraspberrypi weewx[3120]: fousb: polling interval is 60
Dec  1 10:47:53 WXraspberrypi weewx[3120]: fousb: found station on USB 
bus=001 device=007
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.engine.StdTimeSynch
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Finished loading service 
weewx.engine.StdTimeSynch
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.engine.StdConvert
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: StdConvert target unit 
is 0x1
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Finished loading service 
weewx.engine.StdConvert
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.engine.StdCalibrate
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Finished loading service 
weewx.engine.StdCalibrate
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.engine.StdQC
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Finished loading service 
weewx.engine.StdQC
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.wxservices.StdWXCalculate
Dec  1 10:47:53 WXraspberrypi weewx[3120]: wxcalculate: The following 
values will be calculated: 
barometer=prefer_hardware,windchill=prefer_hardware,dewpoint=prefer_hardware,appTemp=prefer_hardware,rainRate=prefer_hardware,windrun=prefer_hardware,heatindex=prefer_hardware,maxSolarRad=prefer_hardware,humidex=prefer_hardware,pressure=prefer_hardware,inDewpoint=prefer_hardware,ET=prefer_hardware,altimeter=prefer_hardware,cloudbase=prefer_hardware
Dec  1 10:47:53 WXraspberrypi weewx[3120]: wxcalculate: The following 
algorithms will be used for calculations: altimeter=aaNOAA,maxSolarRad=RS
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Finished loading service 
weewx.wxservices.StdWXCalculate
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Loading service 
weewx.engine.StdArchive
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Archive will use data 
binding wx_binding
Dec  1 10:47:53 WXraspberrypi weewx[3120]: engine: Record generation will 
be attempted in 'software'
Dec  1 10:48:01 WXraspberrypi motion: [1] [NTC] [ALL] motion_loop: End of 
event 18
Dec  1 10:48:08 WXraspberrypi weewx[3120]: fousb: get archive interval 
failed attempt 1 of 3: could not detach kernel driver from interface 0: No 
data available
Dec  1 10:48:23 WXraspberrypi weewx[3120]: fousb: get archive interval 
failed attempt 2 of 3: could not detach kernel driver from interface 0: No 
data available
Dec  1 10:48:27 WXraspberrypi motion: [1] [NTC] [EVT] event_new_video FPS 5
Dec  1 10:48:27 WXraspberrypi motion: [1] [NTC] [ALL] motion_detected: 
Motion detected - starting event 19
Dec  1 10:48:38 WXraspberrypi weewx[3120]: fousb: get archive interval 
failed attempt 3 of 3: could not detach kernel driver from interface 0: No 
data available
Dec  1 10:48:38 WXraspberrypi weewx[3120]: engine: Caught WeeWxIOError: 
Unable to read archive interval after 3 tries
Dec  1 10:48:38 WXraspberrypi weewx[3120]:     ****  Waiting 60 seconds 
then retrying...


Any ideas? 


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