You were missing a my and a right bracket too

#!/home/cnda/master/bin/perl/bin/perl

  use strict;
  use warnings;
  use IO::Compress::Zip;

  use Archive::Zip qw( :ERROR_CODES :CONSTANTS );
  use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ;



  my @list=('E:/synctest/y2017.zip');

  foreach my $path (@list){

    my $zip = Archive::Zip->new();
    unless ( $zip->read( $path ) == AZ_OK ) { die 'read error';} 
    
    my @membersfn=$zip->memberNames(); 

    for my $pathAndFilename (@membersfn) { 
        
        print "$pathAndFilename\n";
        my $member = $zip->memberNamed( $pathAndFilename );
        if ($member) { 
            $member->desiredCompressionMethod( COMPRESSION_STORED );
            my $status = $member->rewindData();
            die "error $status" unless $status == AZ_OK;
            my $membdata=''; 
            while (!$member->readIsDone()){ 
              my ( $bufferRef, $status ) = $member->readChunk(4*1024);
              die "error $status"
                    if $status != AZ_OK && $status != AZ_STREAM_END;
              $membdata.=$$bufferRef; 
              } # ! done 
            my $flatdata; 
            gunzip \$membdata=>\$flatdata; 
            unless (defined $flatdata) {die "IO::Uncompress::Gunzip+un
+zip failed: $GunzipError\n"; } 
            print $flatdata."\n"; 
            } # member 
        }# pathAndFilename
    } # path
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