my @subf=$field->subfields;
# loop through each subfield
for my $i (0..$#subf) {
- $subf[$i][0] = "@" unless $subf[$i][0];
+ $subf[$i][0] = "@" unless defined $subf[$i][0];
# next if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{tab} ne $tabloop);
next if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{hidden});
my %subfield_data;