I'm trying to use fetch to download a sequence. However, I keep on getting `501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed)` even though I have ran `sudo cpan install LWP::Protocol::https`

The terminal output is as follows:

    $ efetch -db nuccore -id AF086833 -format fasta
    501 Protocol scheme 'https' is not supported (LWP::Protocol::https not installed)
    No do_post output returned from 'https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=nuccore&id=AF086833&rettype=fasta&retmode=text&edirect=7.00&tool=edirect&email=kjsdhjasv@MacBook-Air.local'
    Result of do_post http request is
    $VAR1 = bless( {
                     '_rc' => 501,
                     '_content' => 'LWP will support https URLs if the LWP::Protocol::https module
    is installed.
    ',
                     '_msg' => 'Protocol scheme \'https\' is not supported (LWP::Protocol::https not installed)',
                     '_request' => bless( {
                                            '_method' => 'POST',
                                            '_content' => 'db=nuccore&id=AF086833&rettype=fasta&retmode=text&edirect=7.00&tool=edirect&email=kjsdhjasv@MacBook-Air.local',
                                            '_uri' => bless( do{\(my $o = 'https://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi')}, 'URI::https' ),
                                            '_headers' => bless( {
                                                                   'content-type' => 'application/x-www-form-urlencoded',
                                                                   'user-agent' => 'libwww-perl/6.26'
                                                                 }, 'HTTP::Headers' )
                                          }, 'HTTP::Request' ),
                     '_headers' => bless( {
                                            'client-warning' => 'Internal response',
                                            'content-type' => 'text/plain',
                                            '::std_case' => {
                                                              'client-warning' => 'Client-Warning',
                                                              'client-date' => 'Client-Date'
                                                            },
                                            'client-date' => 'Mon, 02 Oct 2017 15:56:40 GMT'
                                          }, 'HTTP::Headers' )
                   }, 'HTTP::Response' );


Hi,

How did you install Entrez direct tool?

This is due to a mistake in the installation of Entrez direct tool. Try this code to install it!

    mkdir -p ~/src 
    curl https://ftp.ncbi.nlm.nih.gov/entrez/entrezdirect/edirect.zip > ~/src/edirect.zip 
    unzip -o ~/src/edirect.zip  -d ~/src 
    echo 'export PATH=~/src/edirect:$PATH' >> ~/.bashrc 
    source  ~/.bashrc

Tarek
