in reply to Re^2: failure to generate report file
in thread failure to generate report file

Strange... when you run it, does it print that line to standard output? When I run your script, it looks like this... 
$ perl -w temp18.pl
found: 2 1168473601     133714761
found: 3 1168473601     595131400
found: 5 1168473602     595191883
found: 8 1168473604     006456768
found: 10 1168477626    133714761
REFS 133714761: occurrences at 1168473601 and 1168477626
$ cat report.2008-01-11.txt
REFS 133714761: occurrences at 1168473601and 1168477626

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