perl - genbank形式から配列を引き出す

Question

このコードは正常に動作していましたが、今度は不平を言います。genbank 構造は変更されましたか?

#!/usr/bin/perl -w                                                                                                                                                                 
#use strinct ;                                                                                                                                                                     

use Bio::SeqIO;
use Bio::Seq;
use Bio::DB::EUtilities;


    @refSeqIDs=qw(NC_000915.1 NC_017379.1 NC_017371.1 NC_017354.1);
    foreach my $refSeqIDs (@refSeqIDs){
        my $factory = Bio::DB::EUtilities->new(-eutil   => 'efetch',-db=> 'protein',-  rettype => 'gb',
                                           -email   => 'x@y.com',-id=> $refSeqIDs);
        my $rawfile = "$refSeqIDs.gbk";
        $factory->get_Response(-file =>"$refSeqIDs.gbk");
        my $seqio_object = Bio::SeqIO->new(-format=>"Genbank",-file =>"$refSeqIDs.gbk");
        while ( my $seq_object=$seqio_object->next_seq){
            $sequence=$seq_object->seq;
            print ("$sequence\n");
        }
    }