You should try creating another array with just 'Test MMA' in it and give it a try. Or perhaps, you could just try copying the following into a new file and test to see if it works. If it does than you know something is wrong with your array definition.

my $array = ['','Test MMA','Generic key'];
my %hash = (
  "Common SW Component" => "4885",
  "Test MMA" => "5130",
  "Generic key" => "5033",
  "Another generic key" => "4575",
);

my $variable = "@$array[1]";
print "$hash{$variable}\n";
[download]