You guessed right, Tom, installing libopenjp2-7 solved the problem.

Question: why was this module not installed by the weewx install?
Op maandag 29 mei 2023 om 10:03:49 UTC-3 schreef Tom Keffer:

> I would guess that you're missing the underlying JPEG library
>
>
> *sudo apt install libopenjp2-7*
>
> -tk
>
>
> On Mon, May 29, 2023 at 5:56 AM Lucas Heijst <ljm.h...@gmail.com> wrote:
>
>> Started with a fresh install of debian buster light on my rpi model 2 
>> Followed by a fresh install of weewx via:
>> pip3 install weewx --user
>> /root/.local/bin/weectl station create --no-prompt
>>
>> I got the following error:
>> Traceback (most recent call last):
>>   File "/root/.local/lib/python3.7/site-packages/weewx/reportengine.py", 
>> line 179, in run
>>     obj = weeutil.weeutil.get_object(generator)(
>>   File "/root/.local/lib/python3.7/site-packages/weeutil/weeutil.py", 
>> line 1352, in get_object
>>     mod = __import__(module)
>>   File 
>> "/root/.local/lib/python3.7/site-packages/weewx/imagegenerator.py", line 
>> 14, in <module>
>>     import weeplot.genplot
>>   File "/root/.local/lib/python3.7/site-packages/weeplot/genplot.py", 
>> line 13, in <module>
>>     from PIL import Image, ImageDraw, ImageFont
>>   File "/root/.local/lib/python3.7/site-packages/PIL/Image.py", line 103, 
>> in <module>
>>     from . import _imaging as core
>> ImportError: libopenjp2.so.7: cannot open shared object file: No such 
>> file or directory
>>
>> pip3 install weewx --upgrade reports:
>> Looking in indexes: https://pypi.org/simple, 
>> https://www.piwheels.org/simple
>> Requirement already up-to-date: weewx in 
>> /root/.local/lib/python3.7/site-packages (5.0.0b3)
>> Requirement already satisfied, skipping upgrade: configobj<6.0,>=5.0 in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (5.0.8)
>> Requirement already satisfied, skipping upgrade: *Pillow>=5.2* in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (9.5.0)
>> Requirement already satisfied, skipping upgrade: pyusb<2.0.0,>=1.0.2 in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (1.2.1)
>> Requirement already satisfied, skipping upgrade: ephem<5.0,>=4.1 in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (4.1.4)
>> Requirement already satisfied, skipping upgrade: six<2,>=1 in 
>> /usr/lib/python3/dist-packages (from weewx) (1.12.0)
>> Requirement already satisfied, skipping upgrade: pyserial<4.0,>=3.4 in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (3.5)
>> Requirement already satisfied, skipping upgrade: PyMySQL[rsa]<2.0,>=1.0 
>> in /root/.local/lib/python3.7/site-packages (from weewx) (1.0.3)
>> Requirement already satisfied, skipping upgrade: CT3<4.0,>=3.1 in 
>> /root/.local/lib/python3.7/site-packages (from weewx) (3.3.1)
>> Requirement already satisfied, skipping upgrade: cryptography; extra == 
>> "rsa" in /usr/lib/python3/dist-packages (from 
>> PyMySQL[rsa]<2.0,>=1.0->weewx) (2.6.1)
>>
>> Tom, 
>> on feb 21, 2023 you wrote:
>> -----
>> Well, shoot. Now I remember why I required Pillow >=8.2. You get a 
>> mysterious segfault with earlier versions. The problem was fixed in Pillow 
>> 8.2.
>>
>> See https://github.com/python-pillow/Pillow/issues/3066
>>
>> However, there is a workaround, provided no one is trying to use a font 
>> that requires a vertical layout. I think we're safe there. v5.0.0a20 uses 
>> the workaround.
>> -----
>>
>> The current version of Pillow  meets the condition >= 8.2 however:
>> pip3 show Pillow
>> Name: Pillow
>> *Version: 9.5.0*
>> Summary: Python Imaging Library (Fork)
>> Home-page: https://python-pillow.org
>> Author: Jeffrey A. Clark (Alex)
>> Author-email: acl...@aclark.net
>> License: HPND
>> Location: /root/.local/lib/python3.7/site-packages
>> Requires:
>> Required-by: weewx
>>
>> So, what's wrong this time?
>>
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>>
>

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