Read the statement by Michael Teeuw here.
MMM-FRITZ-Box-Callmonitor-py3 unknown_error
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 @wuermchen 
 The log info from MMM-FRITZ-Box-Callmonitor seems to be O.K. …
 Regards,
 Ralf
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 I reinstalled Fritzcallmonitor. The error still exists. 
 During installation there were changes compared to the template:python-dev = Doch die folgenden Pakete ersetzen es: python-dev-is-python3 sudo pip install fritzconnection error: externally-managed-environment sudo pipx install fritzconnectionDoes anyone have any idea what I’m doing wrong? 
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 @wuermchen does the pip setup require a virtual environment? 
 which you have to enable again before launching MagicMirror
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 I installed pipx before and then “sudo pipx install fritzconnection” so I don’t need a virtual environment 
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 @wuermchen yes, but it failed 
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 When I try to reinstall fritzconnection I get the following message: 'fritzconnection' already seems to be installed. Not modifying existing installation in '/root/.local/pipx/venvs/fritzconnection'. Pass '--force' to force installation.
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 New attempt: I did not install fritzconnection via pipx, but with pip. I had to turn off the “externally managed” message beforehand. 
 The phone book is now being read.
 The call is not yet displayed. The list is only displayed after a restart.
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 Finally! After restarting it works. 
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S sdetweil has marked this topic as solved on
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 @wuermchen Great, congratulations. Ralf 
 
