Try using File::Copy instead. File::NCopy seems to be broken.

Update: the following illustrates the issue:

use strict;
use warnings;
use File::Copy;
use File::NCopy;

use constant FILENAME_1 => 'File with spaces in the name.txt';
use constant FILENAME_2 => 'File with spaces in the name2.txt';
use constant FILENAME1 => 'Filename.txt';
use constant FILENAME2 => 'Filename2.txt';

open outFile, '>', FILENAME1;
print outFile "Some text in non-spaced out file\n";
close outFile;

open outFile, '>', FILENAME_1;
print outFile "Some text in the spaced out file\n";
close outFile;

File::NCopy::copy (FILENAME1, FILENAME2) or warn "Non-spaced to non-sp
+aced failed with NCopy\n";
File::NCopy::copy (FILENAME_1, FILENAME2) or warn "Spaced to non-space
+d failed with NCopy\n";
File::NCopy::copy (FILENAME1, FILENAME_2) or warn "Non-spaced to space
+d failed with NCopy\n";
File::NCopy::copy (FILENAME_1, FILENAME_2) or warn "Spaced to spaced f
+ailed with NCopy\n";
File::Copy::copy (FILENAME1, FILENAME2) or warn "Non-spaced to non-spa
+ced failed with Copy\n";
File::Copy::copy (FILENAME_1, FILENAME2) or warn "Spaced to non-spaced
+ failed with Copy\n";
File::Copy::copy (FILENAME1, FILENAME_2) or warn "Non-spaced to spaced
+ failed with Copy\n";
File::Copy::copy (FILENAME_1, FILENAME_2) or warn "Spaced to spaced fa
+iled with Copy\n";
[download]

prints:

Spaced to non-spaced failed with NCopy
Spaced to spaced failed with NCopy
[download]

File::NCopy's copy's argument is a glob pattern, not a file name. This pattern is passed to glob, which considers spaces to be pattern seperators, not literals. Refer to the passage I emphasised in the following snippet from File::Glob's documentation:

Since v5.6.0, Perl's CORE::glob() is implemented in terms of [File::Glob's] bsd_glob(). Note that they don't share the same prototype — CORE::glob() only accepts a single argument. Due to historical reasons, CORE::glob() will also split its argument on whitespace, treating it as multiple patterns, whereas bsd_glob() considers them as one pattern.

Update: File::NCopy works if you execute the following before calling copy:

{
   package File::NCopy;
   use File::DosGlob qw( glob );
}
[download]

And if the spaces are backslashed (or quoted).
And if / is used as the path seperator on Windows.

$filename = 'c:/directory\\ name/file\\ name.txt';
$filename = '"c:/directory name/file name.txt"';
$filename = 'c:/"directory name"/"file name.txt"';
[download]

Truly, File::NCopy should be used with care if not considered outright broken. At the very least, it would be best if File::NCopy used bsd_glob rather than glob.