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There is no reason to get different data for October in the AWStats reports whenever you run the stats in November 2007 or in April 2008, except if the AWStats configuration file was changed or if the AWStats version was changed.

About the configuration file: it can be used to exclude some pages or some hosts (visitors) from the stats.

About the AWStats version: when updating to a new release of AWStats, you also update the lists of known robots. Thus some hits and page views could pass from the “visitors” sections to the “robots” sections.

Jean-Luc said:

I just remembered that, in another topic, you wrote:

My problem is resolved. It looks like the executables got corrupted, somehow. I had the backup team restore the awstats directory structure from a previous backup.

It would be interesting to compare the AWStats database file of October 2007 that you have now with the “same” database file from a previous backup. Maybe the same happened to the database files as to the AWStats executable ?

The executables were corrupted recently; this discrepancy happened back in 2007. After researching, I think it might be due to some missing logs at the time. I'm not 100% sure; however, the server did run into space issues and a lot of the cron jobs did not run successfully. Over a period of time, they were rebuilding websites. I don't have the details; but I was told that it was around the Oct/Nov/December timeframe.

Thanks for all of your suggestions and ideas. Going forward, we will monitor it closely and see if varying results occur again.