Can't create printer; cupsd stops when I try

[Leon Goldman]

>
> More information. When I try via the command line, I see this:
>
> lpadmin -p MFCJ6710DW -E -v usb:/dev/usb/lp0 -P /usr/share/cups/model/Brother/brother_mfcj6710dw_printer_en.ppd
> lpadmin: Success
>
> When I try then to access CUPS via the web interface, I cannot connect to the server and need to restart cupsd.
>
> When I do that the printer does not show up at all.
>
> I suspect after all my trying to use 1.6.1 adn going back and forth, there are some incompatible libraries or something causing the conflict, but I have no idea where to start or what to look for.
> Thanks
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Further info:
with the effort to create the printer, the error.log and access.log have no errors or messages other than the printer was created.

However, the message log shows:
Nov  2 20:39:32 localhost smbd[3970]:   Could not find child 12783 -- ignoring
Nov  2 20:39:59 localhost systemd[1]: cups.service: main process exited, code=exited, status=127
Nov  2 20:39:59 localhost systemd[1]: Unit cups.service entered failed state.
Nov  2 20:40:32 localhost smbd[14630]: [2012/11/02 20:40:32.465222,  0] printing/print_cups.c:109(cups_connect)
Nov  2 20:40:32 localhost smbd[14630]:   Unable to connect to CUPS server /var/run/cups/cups.sock:631 - Connection refused

At the moment the program tries to create the printer there is error status code of 127. I have seen this before. I need help pin pointing its source.