Do you see "test.dat" outputted when you do 
opendir DIR, '.' or die "Cannot open current dir. $!";
print("$_\n") foreach readdir DIR;
closedir DIR;

[download]

If so, I suspect the filename isn't actually "test.dat". Maybe it has a trailing space. Maybe there's some funky character in there that's not getting displayed.

In reply to Re^3: Pulling a file with a given extension by ikegami
in thread Pulling a file with a given extension by rashley

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