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When I tried "force an update" on the WebStatistics topic here's what I got:
TWiki: Create Usage Statistics

Do not interupt! ( Wait until page download has finished )
 * Executed by a guest or a cron job scheduler
 * Statistics for Jan 2001
	*** Error: Log file /data/site/twiki/data/log200101.txt does not exist

Use of uninitialized value in concatenation (.) at wiki.pm line 549. 
Use of uninitialized value in concatenation (.) at wiki.pm line 549.
 * Go back to WebStatistics topic

End creating usage statistics

The bug happens in the time window AFTER the first of the month, BEFORE the first logged activity. I conclude that the statistics generator is assuming at least ONE thing has happened "this month" prior to its execution.

I reach the above conclusion after repeating the error condition, then editing a topic and saving, then forcing an update again. The update worked as soon as there was a data item for January, 2001.

-- PaulReiber (reported to PeterThoeny)

This seems to be a bug that needs to be fixed. It happens at the beginning of a month when the log file does not exist yet, e.g. before any log as been written. The line number of the error seems to be in sub getViewUrl :

	 return "$urlHost$scriptUrlPath/view$scriptSuffix/$web/$theTopic";

-- PeterThoeny - 04 Jan 2001

Fixed and in TWikiAlphaRelease.

-- PeterThoeny - 11 Aug 2001

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Topic revision: r2 - 2001-08-11 - PeterThoeny
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