This is the closest to a solution of the replies so far, I am using Eclipse with EPIC package installed. When I save the file the previously mentioned error appears.

#!c:\Perl\bin\perl
use warnings;
use strict;
use CGI ':standard';
use constant CONSTANT1 => '../perlscript1.pl';
use constant CONSTANT2 => '../perlscript2.pl';
my $htmlPage = CGI->new;

print $htmlPage->a( { -href => CONSTANT2
                    , -target => '_self' }, 'こちら'
+ );
print "</p>\n<p>";
print $htmlPage->a( { -href => CONSTANT1
                    , -target => '_self' }, '&#21033;&#29992;&#35215;&
+#32004;' );
print "</p>";
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