Comment 18 for bug 420490

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Till Kamppeter (till-kamppeter) wrote : Re: There was an error during the CUPS operation: 'client-error-document-format-not-supported'

Can you do "ls -lda /etc/cups/ /usr/share/cups/mime/" and "ls -lda /etc/cups/*.convs /etc/cups/*.types /usr/share/cups/mime/*.convs /usr/share/cups/mime/*.types" and post the output here?

Can you run the following commands:

cupsctl LogLevel=debug2
sudo /etc/init.d/cups stop
sudo /etc/init,d/cups start

and after that attach your error_log. See the "CUPS error_log" section in https://wiki.ubuntu.com/DebuggingPrintingProblems for how to get the error_log attached to a bug report.