getgenbank function's error of downloading

I can't use getgenbank function because of the error below. I have succesfully used this code before with same internet connection. Can someone solve this problem before? Thanks.

>> a= getgenbank('AB247454.1');
        Error using urlreadwrite (line 98)
        Error downloading URL. Your network connection may be down or your proxy settings improperly
        configured.
        
        Error in urlread (line 36)
        [s,status] = urlreadwrite(mfilename,catchErrors,url,varargin{:});
        
        Error in getncbidata>accession2gi (line 349)
            searchXML = urlread(searchurl);
        
        Error in getncbidata (line 181)
        [giID,db] = accession2gi(accessnum,db,'quick');
        
        Error in getgenbank (line 70)
            [varargout{1:nargout}] =
            getncbidata(accessnum,'fileformat','GenBank','database','nucleotide',varargin{:});

[Ive J]

I would guess your network connection has a problem. I could get it smoothly. Also, to my experience NCBI GenBank is not so user friendly; so, just try again!

mySeq = getgenbank('AB247454.1')

 struct with fields:

                LocusName: 'AB247454'
      LocusSequenceLength: '15231'
     LocusNumberofStrands: ''
            LocusTopology: 'linear'
        LocusMoleculeType: 'mRNA'
     LocusGenBankDivision: 'VRT'
    LocusModificationDate: '13-JUL-2007'
               Definition: 'Danio rerio ryr1b mRNA for ryanodine receptor 1b, complete cds.'
                Accession: 'AB247454'
                  Version: 'AB247454.1'
                       GI: ''
                  Project: []
                   DBLink: []
                 Keywords: []
                  Segment: []
                   Source: 'Danio rerio (zebrafish)'
           SourceOrganism: [4×65 char]
                Reference: {[1×1 struct]  [1×1 struct]}
                  Comment: []
                 Features: [100×74 char]
                      CDS: [1×1 struct]
                 Sequence: 'atggcagaaggagaggggggagatgaagagatccagttcctgcggacggaagatcaggttgtgctccagtgcacagcgaccgttctgaaggagcagatcaaactgtgcctgtcctgcgaaggctttgggaaccggctgtgctttttagagacaacttcaaatgcccagaatgttccccctgatctagccatctgttcgtttgtgctggagcagtcgctgtcggttcgagctctgcaggagatgctggcgaacaccgtggacatgacggagtcatctcagggaggaggacaccgaacgctgctatatggtcatgccatcctcctgagacactaccattctagcatgtatcttagctgtctgacgacatcacgttcactaacagacaagctggcctttgatgtgggcctgcagttggatgcaacaggggaagcatgttggtggaccatccatcctgcatccaaacagagatccgagggtgagaaggtcagagtaggagacgacctgatccttgtcagcgtgtcatcagagagatacctacatctgtcatacgccagtggagacctgatggttgatgcctccttcatgcagaccttatggaacatgaatccagtctgttcaggttgcgagttggcagaggggtacttaactggaggtcatgtcttaagactgtttcatggtcacatggatgagtgtctggccatctcaacacctgatcagggagaggagcagcgcaagattgcgcagtatgaaggaggggcagtatgtagtcaggcccgctcattgtggagacttgagcctctgagaatcggatggagcggtagccacatgaagtggggtcaggcgttccgcgttcgccacatcacaacaggtcgatatctgtgtctggatgatgagaagggcctgatggttctggatccagagaaagcaaacaccaaacaatctgccttctctttccgtgcctcaaaagagaaagtggaaggggagaagaaaaagcgggatgttgagggaatgggtattcctgagatcaagtatggcgagtccatgtgctttatgcagcatatttctacaggcctgtggctcacatatgctgctttagatgctaaagcggctcgcctgggaaccatgaagagaagggtcatgttacatcaagagggccatatggatgacgcactgacctgctctcgctctcagacagaagagtcccaggcggctcgtatgatctacagcaccacaggcctttttacacagttcatcaaaggtctggactctctcagtgggaagaacaaatcacccggtccagtgtctctgcctctggatggagtgattctgtcccttcaggatctgatccactacttcagacctccagaggaagagctggaacacgaggagaaacagaccaaactgcgttcgctacgcaaccgacagaacctcttccaagaggaggggatgatcaccatcgtgctggaatgtatcgaccggctgaacgtctacaacactgctgcacacttctctgagtttgctggagaggaagcagctgaatcctggaaagagatcgtcaatttgctctatgagctgcttgcatctctgatcagaggaaaccgttctaactgtgctctgttttgtgataatctggactggctggtcagtaaactggatcgtctggaagcttcatcaggcattctcgaggtgctgtactgtgttttgattgaaagtcctgaagtcttaaacatcattcaggagaatcacatcaagtccatcatttctctcttagacaaacatggacgaaaccataaggttttggacgtgttgcggtctctgtgtgtgtgtaacggtgttgctgtgaggtccaatcaaaacctcatcaccgaaaatttacttccgggtcgtgacctgctactgcagactaacatcgttaactatgcttcaagtgtgaggcccaatatcttcttggggacttgtgaaggttccacccagtataagaagtggtattttgaggtgatggtggactatgtggagtcatttgtgacggctcaggccactcatctgcgagtgggctgggccatgactgaaggcttcagcccatacccaggaggaggagagggctgggggggcaatggtgtgggtgatgacctctactcttatggctttgatggacttcacttgtggtcaggtcatgtgtcacgtcaggtggcttcgcccaatcagcatgccttggcagctgatgatgtcgtgagttgttgtttggatctgagcgtgcccagtatctccttccgcatcaatggccatccggtccagggaatgtttgagaacttcaacttagatggcttgttcttccctgccattagcttttctgctggagtgaaagcccgctttcttttaggtggccgtcatggggattttaagtttttacctcctcctggttatgcaccatgttatgaggctcttcttcccaaagacaggatgcgcattgagcccattaaagagtataaacatgactttgaaggagtcagaaacctgttagggcccacacagtccctcacacacacctcattcactccctgtcctgttgacacggctcagattgttctacctcctcatttggagcggatcagagagaagcttgccgaaaacatacatgagctctgggctgtgacccgtattgagcagggctggacctatggagtgttcagggatgataataagaagttgcacccgtgtctggtggactttcaaagtcttccagaacccgagagaaattataacctccagatgtctggagagaccttgaaaaccctgttagctctgggctgccatgtaggcatgggagatgagaaagcagaggagaatctgagaaagatcaaattgcccaaaacttatgtgatgagcagcggatacaaacccgctcctttggacctcaatcatgtcaaactgacgcctaatcagaaccagttggttgaaaagctggcagaaaacgggcacaatgtttgggcaagagacagagtcagacaaggatggacctacagcattgtgcaggatattgtgaataagcgtaaccctcgtctggtgccttacaatttgctagacgagagaaccaagaagaccaaccgagacagtgtgaacaatgctgtacgcactttgattggttacggatataacatcgagccaccagatcaggagagcagcggtcatggtgttgaggatgtgcatggagataaagtgagaatcttcagggcagagaagcagtatggtgttacctcaggaaaatggtattttgagttcgaggctgtaactacaggagaaatgagggtcggctgggctcgaccgaacgtccgctctgatgttgagcttggttctgatgagttggcctatgtcttcaatggaaacagggctcagcgatggcacattggtaatgatccgtttggtcgtcagtggcagtctggtgatgttgttggttgcatgatagacctcattgaaatgaacatcatgttcacgctcaacggagagatgctgatcagcgattctggttcggaaatggccttcaaagacattgagattggagacggctttattccagtttgcactctgggtctttctcaggttgggcgtattaaccttggtcagaatgttagcagtttgcgctacttcgccatctgtggcctccaagagggctttgagccattcgccatcaacatgaagagagacatcacaatgtggttcagcaagagcctgccccagtttgttcccgttcccactgatcacaaccacattgaggtctctcgtgtggatggaactgtagacagtgctccctgtataaaaattacccacaagacgttcggatcccaaaacgccaacactgacatgctgttcttcaggctaagcatgccagtggagtttcaccttacctttaaggtgcctgctggcactacccccctcacacgagccctcaccatcccagaagaagaagtgctggaggtggacccagactcagactatgaggtgcttaagaagtccgccagtcgcaaagagcaggaggagaaagaaaaggagccgtctgttcctaaagatatcccaggcgttaaagaaaacgacaaagacactgcatctgagaaaggaaagaagaaaggcttcttgtttaaagctaaaaaggcagccatgatcactcctcctccacctccacctcttatgcctcgtttgattgaagacgtggtgccagatgatcgcgatgacgtggacatcatccttaataccaccacatactattactcggttcgtatcttcgctggacaagagcctagcgaggtgtgggttggttgggtcacaccagacttccacatgtatgacctcaacttcgatctgtctaaagttcgtacggttacagtgacagttggagacgacaaaggcaacatacatgacagtataaagagaagtaactgctacatggtgtggggaggagagttcagcagcagccagcagaagttcagccaggaggatctggtgattggttgcttggttgatctggcaacaggccttctgaatttcacagccaatggaaaggagatcaacactttctaccaggtggagcccaacactaagctcttcccagctgtgtttgttcttccaagcagccaaaacatgctccagctggaacttggaaaactcaagaatatcatgcctctttcggcagccatgtttcgtagtgagcgcaagaaccctgttcctcagtgtccacctcgactggatgttcagatgttgacccctgtcatctggagccggatgcccaaccacttcctcaatccagtggtgggacgggtgagcgagaggcatggctggatggtggaatgtacagagcctctcactatgatggcgctgcatatacctgaagaaaacaggtgcattgacatcctggaactatctgagcaacatgacctgctgcagttccactatcacactctgatgctttattgcgccgtgtgtgcactgggcaacaaccgtgtagcccatgccctctgcagccatgtggatgaatcccagctcttctatgcgattgagaacacgtacctgcctggccctctccgcagcggctactacgaccttcttatcagtattcatctggagtcagccaaacgcaaccgcttaggaaccaatcgcgagtttattgttcccatgacatcagagacgcttagtatcacactgttcccagatgcagaggcagcccatgacctgccgggagtgggtctcaccacctgcctcagacctaagctacacttctcccccatcaactttgtaggcactgatccagatctgtacaccctgagccccatcatacctctgcagaatctaaagacccaggctctaagcatgcttactgaagccgtgttcgatggcagccaggccatgcgtgatcctgtagggggcagcgttgagttccacttcgttccaatcctcaaactcatcagcactctcctcatcatgggcatcttcaacaatgaagacgtcaagcacatcctcaagatgattgatcccagtgtgtttggaaagaaagaagaggcagaggaaccagccgaggaagcagctcccaaagaggaaggagaggaagtgaaagagaaagaagaaacggctgaaggagaggaggaggctgtggatgaaggagttggggaggaggaagaggaggagctgaaagagctgaagaaggaggagggagaggaaggagaagaggtcgagaaggccgtagaggaggaggatggagagaaggtggatggagaaaaagcagaggaggaaaaggaggcagaagaagtaggagaggaggccaaagaggaagaagaggaggcgccagaggagggtctacttcaaatgaagatgccagagtctgtgaaactgcagatgtgtactcttctacagtatttctgcgactgtgagctcagacacagagttgaagccataatggcatactctgataattttgtagggcagatccagtcaaaccagcgtgagcgttataatgagctaatgagagcgtttactatgtctgctgcagaaacagctcgcaggacccgagagtttcgctctcctccacaagaacaaattttcctgttgactaacttcaagcacaacccagaagaagaagattgccctgtcccagatgaagtgcgagaaacccacaacaatttccacaatgacctcctgaatcactgtggcgtccacattgaggaagaagtggaggaggaagaggtggacacatctctgagaggcagactgctcactttggtggacaaggtcaaaagccttaagcagaaaaaggaagaagaggaaccagagccagaggaagaacccaaaccaagtactttacaggagttgatatcccacacaatgatccactgggctcaagaggcctttattcagaatccagagctggtgcgactcatgttcagtcttctccaccggcagtatgatgctcttggagagctgattcgtgcactgcccaaggcttacgccatcagtgccgtgtctgtacaagacacgatggaaatgctggagtgcctggggcagattcgatctctgcttattgtccagatgggtccggaagaggaaagactcatgatccagagcattgggaacatcatgaacaacaaagtgttctaccagcaccctaacctgatgcgagcgctgggcatgcatgagacagtcatggaggtgatggtcaacgtgctgggaggtggaggagattcaaaggaaattcgatttccacaaatggtgaccaactgctgtcgcttcctgtgctacttctgcagaatcagccgccagaaccagcgctccatgtttgaccacctctcttacttgctgcagaacagtggcattggactgggaatgcgtggatctacccctctggatgttgctgctgcatcctgcattgacaacaatgagctggcactggccctgcaagagcaagaccttgaaatggtggtgacttatctggctgggtgtggccttcgaatgtgccccatgcttctgtctaaaggctatcctgacatagggtggaatccaggtggaggagagagatatctggacttcctgcgcttcgctgtgtttgtaaatggtgagagcgtagaggagaatgctaatgtggttgttcgtctgttgattcgtcgtcctgagtgctttggccctgccctgagaggagagggtggtgctggtctgttagcagccattgaggaggccattaagatctctgaagaccctgccagagatgggccaactcctaaaaaagacagacgcttcatgtttggaggggaggatcagcacgaagagaatagattacatcttggaaatgctatcatgtcattttattctgcccttattgacttgctgggtcgctgtgctcctgagatgcatttgatccaagcaggtaaaggcgaagctttgagaatccgagccatcttgcgatctcttgtgcccattgaagacttggttggagtcatcagtcttcctgttcaaatccccacctttggcaaagatggtcagatcgttgagccaaaaatgtcagcgagtttcgtgccagaccacaaagcctccatggttcttttcctggacagagtgtacggcatcgataaccaggacttcctgttacatgtgctagaagtgggtttcttgcccgatatgagagcttcagcctctctggatacggtggcgttcagcaccacagaaatggctctggctctgaaccgttacttgtgttctgccgttctgcctctgctcactaaatgtgccccactgttcgctggcactgatcatcgcgccatcatgatcgactctatgctgcacaccatctacaggctgtcccgaggccgtgcccttaccaaagcccagagggacgtcattgaggactgccttatgtctcttgtcaagtatctgcggccatctatgttgcagcatctgttgagaaggctggtgtttgatgtgccaatcttaaatgagtatgccaagatgcccctcaagctgttgaccaatcactacgagcgctgctggaagtattattgcctgccgaacggatgggcaaacttcggagtcacatcagaagaggagctgcatctctcacgcaaactcttctggggcatatttgagtctctcgcacacaagaaattcgatgcagagctgtttaagatcgccatgccctgcatctgtgccattgcgggtgccattcctccagactatgtggatgcaagttattcatcaatgactgagaagaaagcgtctgttgatgctgagggcaacttcgaccccaaaccagtggaaactaccaacaccatcattcccgagagacttgatgccttcattaacaaatatgctgagcacactcatgataaatgggcttttgagaagatccaaaacaactggacatatggagaggttctagatgagaacgccaaaactcaccccatgctgcggccttataaaactttctctgaaaaggataaggagatctatcgctggcccattaaggagtccatcaaggccatgctggcatgggaatggactttagagaaagccagagatggggagactgaggtaaaaactgaggtgaaggccaccaggaagatctcccagactgcacaggccacctatgatcccagtcaaggatactctcctcagccagtggaccttataggcatggccttgtccagagagctacagtctatggcagaacagcttgcagagaactaccacaacacctggggccgcaagaagaaaatggagctacaagccaagggtggtggcactcatcctttgttggtaccctatgatacactgacggccaaagagaaggctagagacagagaaaaagcccaagacctgctcaaattcctccagctgaatggatacgctgtaaccaggggtttgaaagacatggagcaggagatttcctccattgagaagcgctttgcttacgggttcctgcagaagctgttgaagtggatggagatcgctcaggagtttattgctcatcttgaggctgtcgtgagcagtggaagagttgaaaaatccccacacgaacaggagattaaattctttgcaaagattctgctcccgctcataaaccagtactttaagaaccactgcctgtatttcctgtccactcctgctaaagtgctgggcagtggtggtcacgcatccaacaaggagaaggagatgattgctagtatcttctgtaagttggccggtctggtgagacacagggtttccctctttggcactgatgcctcagctgtggtcaactgtcttcatattctttcccgttcactggatgccaggactgtaatgaaatctgggcctgagattgtgaaggctggtctgcgctcattctttgaaagtgctgctgatgatattgagaagatggttgagaacctcaaattagggaaagtgtccaccaaaaatcaggtgaaaggtgtatctcagaacattagctacaccaccactgctcttctgccagtcctgacctctctgttcgaccacatcgcccagcaccagtttggagatgatgtcatgttggatgacttgcagatctcctgttaccgcatcatgtgcagtatctactcactgggcaccgtaaagactcctcatgctgagaaccaaagaccagctctaggagagtgtctggctcatcttgctgccgccatgcctgttgccttcctggagccaaacctcaacgagttcaactcatactctgtgtacactaccaaaaccccacgagagagaacaattctgggtctccccagtcaagtgcaggagctgtgtctggacatccctgagctggacgtgttgatgaaagaaatcgggcatctggcagagtctggggcccgttacacagagatgcctcacgtgattgagatcaccctacctatgctctgcaactatctgcctcgctggtgggaaaggggaccagagaacttcccagagcaggaaggctgtctgtgcaccgacgtcacctccgaacaactcaatcaac…'
                SearchURL: 'https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?db=nuccore&id=AB247454.1'
              RetrieveURL: 'https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=nuccore&id=152002443&rettype=gb&retmode=text'