OK, the problem is that you're asking to plot something with a minimum and
maximum value of -17.7777778, but the scaling has been set to (0, None,
.01), meaning the minimum y-axis value is pegged at 0.0. The plot becomes
impossible.

Still, it shouldn't crash the report, so it's a bug.

But, I would set scaling to (None, None, 0.01).

On Thu, Jan 14, 2021 at 9:53 AM Tarmo <[email protected]> wrote:

> I recgonize yscale=[0.0, None, 0.01] as my heatpump service
> <https://github.com/tsoodla/weewx-luxtronik> image. The service is not
> running currently and the soiltemp3 (where the values are stored) in the
> database is empty.
>
> Jan 14 19:40:30 pi3 weewx[5405] INFO weewx.cheetahgenerator: Generated 8
> files for report SeasonsReport in 4.85 seconds
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weeplot.genplot: scale error math
> domain error
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weeplot.genplot:
> ymin=-17.77777777777778; ymax=-17.77777777777778; yscale=[0.0, None, 0.01],
> y_nticks=10
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine: Caught
> unrecoverable exception in generator 'weewx.imagegenerator.ImageGenerator'
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> math domain error
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> Traceback (most recent call last):
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weewx/reportengine.py", line 196, in run
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   obj.start()
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weewx/reportengine.py", line 281, in start
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   self.run()
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weewx/imagegenerator.py", line 41, in run
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   self.genImages(self.gen_ts)
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weewx/imagegenerator.py", line 263, in genImages
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   image = plot.render()
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weeplot/genplot.py", line 212, in render
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   self._calcYScaling()
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weeplot/genplot.py", line 520, in _calcYScaling
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   self.yscale = weeplot.utilities.scale(ymin, ymax, self.yscale,
> nsteps=self.y_nticks)
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> File "/home/weewx/bin/weeplot/utilities.py", line 132, in scale
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
>   mag = math.floor(math.log10(steps))
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> ValueError: math domain error
> Jan 14 19:40:35 pi3 weewx[5405] ERROR weewx.reportengine:         ****
> Generator terminated
> Jan 14 19:40:35 pi3 weewx[5405] INFO weewx.reportengine: Copied 15 files
> to /var/ramdisk/ilmajaam
>
>
> On Thursday, January 14, 2021 at 7:05:28 PM UTC+2 [email protected] wrote:
>
>> Something deeper must be going on. Please replace your copy of
>> /home/weewx/bin/weeplot/genplot.py with the attached. It has been
>> instrumented to give us more information about the error.
>>
>> Run until weewxd (or wee_reports). Hopefully, the report will crash like
>> before. Post the resultant log.
>>
>> -tk
>>
>> On Thu, Jan 14, 2021 at 7:53 AM Tarmo <[email protected]> wrote:
>>
>>> Hello, Tom!
>>>
>>> No less than or equal to zero values at min_interval.
>>>
>>> pi@pi3:/home/weewx/skins/Seasons $ grep yscale skin.conf
>>>     # plotting can be controlled using option 'yscale'. It is a 3-way
>>> tuple,
>>>     yscale = None, None, None
>>>             yscale = None, None, 0.5
>>>             yscale = None, None, 0.02
>>>             yscale = 0.0, 360.0, 45.0
>>> #            yscale = 0, 16, 1
>>>             yscale = 0.0, 100.0, 25.0
>>>             yscale = 0, None, 0.01
>>>             yscale = None, None, 0.5
>>>             yscale = None, None, 0.02
>>>             yscale = 0.0, 360.0, 45.0
>>> #            yscale = 0, 16, 1
>>>             yscale = 0.0, 100.0, 25.0
>>>             yscale = 0, None, 0.01
>>>             yscale = None, None, 0.5
>>>             yscale = None, None, 0.02
>>>             yscale = 0.0, 360.0, 45.0
>>> #            yscale = 0, 16, 1
>>>             yscale = 0.0, 100.0, 25.0
>>>             yscale = 0, None, 0.01
>>>             yscale = None, None, 0.5
>>>             yscale = None, None, 0.02
>>>             yscale = 0.0, 360.0, 45.0
>>> #            yscale = 0, 16, 1
>>>             yscale = 0.0, 100.0, 25.0
>>>             yscale = 0, None, 0.01
>>>
>>>
>>>
>>> On Thursday, January 14, 2021 at 5:11:12 PM UTC+2 [email protected]
>>> wrote:
>>>
>>>> Hello, Tarmo
>>>>
>>>> One of the images that you are trying to generate has an option y_scale
>>>> <http://www.weewx.com/docs/customizing.htm#Plot_scaling_options> with
>>>> a min_interval of zero, or less than zero.
>>>>
>>>> Look in the file /home/weewx/skins/Seasons/skin.conf for images that
>>>> use y_scale. They will look something like this:
>>>>
>>>>     yscale = 10, 20, -1
>>>>
>>>> or like this
>>>>
>>>>     yscale = 10, 20, 0
>>>>
>>>> The "10" and the "20" do not matter. It's the last number that we care
>>>> about. It cannot be less than or equal to zero.
>>>>
>>>> If you're having trouble, post the file skin.conf.
>>>>
>>>> -tk
>>>>
>>>> On Thu, Jan 14, 2021 at 3:37 AM Tarmo <[email protected]> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Please help with this:
>>>>>
>>>>> Jan 14 13:21:58 pi3 systemd[1]: Starting LSB: weewx weather system...
>>>>> Jan 14 13:21:59 pi3 weewx[1306] INFO __main__: Initializing weewx
>>>>> version 4.3.0b2
>>>>> Jan 14 13:21:59 pi3 weewx[1306] INFO __main__: Using Python 3.5.3
>>>>> (default, Nov 18 2020, 21:09:16) #012[GCC 6.3.0 20170516]
>>>>> Jan 14 13:21:59 pi3 weewx[1306] INFO __main__: Platform
>>>>> Linux-4.19.66-v7+-armv7l-with-debian-9.13
>>>>> Jan 14 13:21:59 pi3 weewx[1306] INFO __main__: Locale is 'en_GB.UTF-8'
>>>>> Jan 14 13:21:59 pi3 weewx[1306] INFO __main__: PID file is
>>>>> /var/run/weewx.pid
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO __main__: Using configuration
>>>>> file /home/weewx/weewx.conf
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO __main__: Debug is 0
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Loading station
>>>>> type Vantage (weewx.drivers.vantage)
>>>>> Jan 14 13:21:59 pi3 weewx[1295]: Starting weewx weather system: weewx.
>>>>> Jan 14 13:21:59 pi3 systemd[1]: Started LSB: weewx weather system.
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: StdConvert target
>>>>> unit is 0x1
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Archive will use
>>>>> data binding wx_binding
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Record generation
>>>>> will be attempted in 'hardware'
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Using archive
>>>>> interval of 300 seconds (specified by hardware)
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.restx: StationRegistry:
>>>>> Station will be registered.
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.mqtt: service version is 0.22
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.mqtt: binding to loop
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.mqtt: topic is weather
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.mqtt: desired unit system is
>>>>> METRIC
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.mqtt: data will be uploaded
>>>>> to mqtt://ilm:xxx@localhost:1883/
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.restx: Wunderground-PWS:
>>>>> Data for station IHARJUMA19 will be posted
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.windy: version is 0.7
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO user.windy: Data will be uploaded
>>>>> to https://stations.windy.com/pws/update
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO __main__: Starting up weewx
>>>>> version 4.3.0b2
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Clock error is 0.06
>>>>> seconds (positive is fast)
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Using binding
>>>>> 'wx_binding' to database 'weewx.sdb'
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.manager: Starting backfill
>>>>> of daily summaries
>>>>> Jan 14 13:21:59 pi3 weewx[1310] INFO weewx.engine: Starting main
>>>>> packet loop.
>>>>> Jan 14 13:25:20 pi3 weewx[1310] INFO weewx.manager: Added record
>>>>> 2021-01-14 13:25:00 EET (1610623500) to database 'weewx.sdb'
>>>>> Jan 14 13:25:20 pi3 weewx[1310] INFO weewx.manager: Added record
>>>>> 2021-01-14 13:25:00 EET (1610623500) to daily summary in 'weewx.sdb'
>>>>> Jan 14 13:25:22 pi3 weewx[1310] INFO weewx.restx: Windy: Published
>>>>> record 2021-01-14 13:25:00 EET (1610623500)
>>>>> Jan 14 13:25:22 pi3 weewx[1310] INFO weewx.restx: StationRegistry:
>>>>> Published record 2021-01-14 13:25:00 EET (1610623500)
>>>>> Jan 14 13:25:22 pi3 weewx[1310] INFO weewx.restx: Wunderground-PWS:
>>>>> Published record 2021-01-14 13:25:00 EET (1610623500)
>>>>> Jan 14 13:27:00 pi3 weewx[1310] INFO weewx.cheetahgenerator: Generated
>>>>> 158 files for report SeasonsReport in 98.47 seconds
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: Caught
>>>>> unrecoverable exception in generator 'weewx.imagegenerator.ImageGenerator'
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** math
>>>>> domain error
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> Traceback (most recent call last):
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weewx/reportengine.py", line 196, in run
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> obj.start()
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weewx/reportengine.py", line 281, in start
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> self.run()
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weewx/imagegenerator.py", line 41, in run
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> self.genImages(self.gen_ts)
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weewx/imagegenerator.py", line 263, in genImages
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** image =
>>>>> plot.render()
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weeplot/genplot.py", line 210, in render
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> self._calcYScaling()
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weeplot/genplot.py", line 517, in _calcYScaling
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> self.yscale = weeplot.utilities.scale(ymin, ymax, self.yscale,
>>>>> nsteps=self.y_nticks)
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** File
>>>>> "/home/weewx/bin/weeplot/utilities.py", line 132, in scale
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: **** mag =
>>>>> math.floor(math.log10(steps))
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> ValueError: math domain error
>>>>> Jan 14 13:27:06 pi3 weewx[1310] ERROR weewx.reportengine: ****
>>>>> Generator terminated
>>>>> Jan 14 13:27:06 pi3 weewx[1310] INFO weewx.reportengine: Copied 15
>>>>> files to /var/ramdisk/ilmajaam
>>>>> Jan 14 13:27:07 pi3 weewx[1310] INFO weeutil.rsyncupload: rsync'd 206
>>>>> files (865,386 bytes) in 0.95 seconds
>>>>>
>>>>> --
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>>>>> https://groups.google.com/d/msgid/weewx-user/4a9fa165-a2d6-42ee-bd21-b592e83bac22n%40googlegroups.com
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>>>>> .
>>>>>
>>>> --
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>>> .
>>>
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