pod2usage(-msg => "Invalid number of arguments!", -exitval => 2, -verbose => 2) if (scalar(@ARGV) != 3);
pod2usage(-msg => "ngvector file cannot be named as #! # is reserved for other purpose!", -exitval => 2, -verbose => 2) if ($ngvF eq "#");
pod2usage(-msg => "Invalid number of arguments!", -exitval => 2, -verbose => 2) if (scalar(@ARGV) != 3);
pod2usage(-msg => "ngvector file cannot be named as #! # is reserved for other purpose!", -exitval => 2, -verbose => 2) if ($ngvF eq "#");