Urchn itself does not create log files. Urchin tells you to put this log format inside of your httpd.con file. APACHE THEN generates the log in this format.
Log analytics detects seems to not be able to IMPORT this log format into Piwik. For some UNKNOWN reason when you attempt to import this log format inside of Piwik, it DOES NOT put any data inside of the “REFFEER” table. It also fails to populate other fields such as Visitor Table or “User Agents”
Piwik will detect standard log formats. It sounds like this log format is not detected yet. Can you create a ticket on dev.piwik.org and attach a small log file with 10-20 lines? then we can try to detect this log format.