try the following on the command line 
perl -e 'opendir DIR, "./";@directory =readdir(DIR);for $entry (@direc
+tory){print "$entry\n";}'

[download]
in your while loop in the failing example $f is a string with the name of a file in it, you have to open, process and close the file inside the loop

In reply to Re^3: processing a lot of files by Utilitarian
in thread processing a lot of files by lomSpace

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