AWstats stopped updating several months ago

We noticed recently that the statistics for all of our hosted websites stopped updating back in November. The strange thing is, it stopped on different days for different sites. On most, I see the file modification dates in "E:\vhosts\domain.com\.plesk\statistics\domain.com\webstat" as November 28, but several sites have other dates in November.

I did find http://kb.odin.com/en/116754 and tried running web_statistics_executor.exe. It comes back with errors for two of my domains...

AWstats stopped updating several months ago