I bet you don't supply the full path to the file you are trying to delete.

my $dir = "dir/foo";
opendir(DIR, $dir);
foreach my $file ( readdir DIR ) {
    unlink "$dir/$file";
}
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As to the dates of files:

• -M Age of file in days when script started.
• -A Same for access time.
• -C Same for inode change time.

You use it like this:

my $m_time = -M "$dir/$file";
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But you can also use the stat command. But remember to give a correct path to the file or else it will obviously not work :-)

As a note, I still do this error all the time :-) Autark