I got this right out of Perl for System Administration: Chapter 9: Log Files: 
open(LOG, "$LogFilename") or die "Unable to open logfile:$!\n";

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The example from that web page uses open(LOG,"logfile") which is a string literal so the quotes are required. Your example uses a scalar variable so the quotes are not required or desirable, see: What's wrong with always quoting "$vars"?

In reply to Re^2: Find a filename in a text file by jwkrahn
in thread Find a filename in a text file by jgatrell42

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