diff --git a/Changes b/Changes
index ae7a48c2..1cbebb0a 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 LIST OF CHANGES FOR NPG-QC PACKAGE
 
+ - Ensured that retrieving values from a partially defined pulldown_metrics
+   result does not trigger an error. Added a test to demonstrate that such
+   result can be loaded to the database without problems.
+
 release 72.0.0
 
  - QC View sorting order to put merged lanes before unmerged.
diff --git a/MANIFEST b/MANIFEST
index af114f86..6a01731d 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -465,6 +465,7 @@ t/data/autoqc/pulldown_metrics/pdm.out
 t/data/autoqc/pulldown_metrics/samplesheet_pulldown.csv
 t/data/autoqc/pulldown_metrics/39193_3_14.pulldown_metrics.json
 t/data/autoqc/pulldown_metrics/40739_2_29.pulldown_metrics.json
+t/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json
 t/data/autoqc/qc/1937_3.map
 t/data/autoqc/qX_yield/npg/instrument/15.xml
 t/data/autoqc/qX_yield/npg/run/2549.xml
diff --git a/lib/npg_qc/autoqc/role/pulldown_metrics.pm b/lib/npg_qc/autoqc/role/pulldown_metrics.pm
index 962077b2..eb4bded5 100644
--- a/lib/npg_qc/autoqc/role/pulldown_metrics.pm
+++ b/lib/npg_qc/autoqc/role/pulldown_metrics.pm
@@ -6,7 +6,7 @@ use Readonly;
 our $VERSION = '0';
 ## no critic (Documentation::RequirePodAtEnd)
 
-Readonly::Scalar our $HUNDRED              => 100;
+Readonly::Scalar our $HUNDRED => 100;
 
 =head1 NAME
 
@@ -27,28 +27,27 @@ npg_qc::autoqc::role::pulldown_metrics
 =cut
 
 sub criterion {
-    my $self = shift;
-
     return q[Fail if on bait bases less than 20%];
 }
 
 =head2 bait_design_efficiency
 
- Target territory / bait territory. 1 == perfectly efficient, 0.5 = half of baited bases are not target. BAIT_DESIGN_EFFICIENCY in Picard metrics.
+ Picard metrics BAIT_DESIGN_EFFICIENCY: target territory / bait territory.
+ 1 == perfectly efficient, 0.5 = half of baited bases are not target.
 
 =cut
 
 sub bait_design_efficiency {
     my $self = shift;
     if ($self->bait_territory && defined $self->target_territory) {
-        return $self->target_territory/$self->bait_territory;
+        return $self->target_territory / $self->bait_territory;
     }
     return;
 }
 
 =head2 unique_reads_percent
 
- unique_reads_num / total_reads_num,  PCT_PF_UQ_READS in Picard metrics.
+ Picard metrics PCT_PF_UQ_READS: unique_reads_num / total_reads_num
 
 =cut
 
@@ -69,106 +68,120 @@ sub unique_reads_percent {
 sub unique_reads_aligned_percent {
     my $self = shift;
     if ($self->total_reads_num && defined $self->unique_reads_aligned_num) {
-        return ($self->unique_reads_aligned_num / $self->total_reads_num) * $HUNDRED;
+        return ($self->unique_reads_aligned_num /
+                $self->total_reads_num) * $HUNDRED;
     }
     return;
 }
 
 =head2 on_bait_reads_percent
 
- Picard metrics:
- PF_UQ_READS_ALIGNED_BAIT :      The number of PF unique reads that are aligned overlapping a bait by >= 1bp
+ Picard metrics PF_UQ_READS_ALIGNED_BAIT:
+ The number of PF unique reads that are aligned overlapping a bait by >= 1bp
 
 =cut
 
 sub on_bait_reads_percent {
     my $self = shift;
 
-      if ($self->total_reads_num && defined $self->other_metrics->{PF_UQ_READS_ALIGNED_BAIT}) {
-       return ($self->other_metrics->{PF_UQ_READS_ALIGNED_BAIT} / $self->total_reads_num) * $HUNDRED;
-      }
+    if (defined $self->other_metrics && $self->total_reads_num &&
+        defined $self->other_metrics->{PF_UQ_READS_ALIGNED_BAIT}) {
+        return ($self->other_metrics->{PF_UQ_READS_ALIGNED_BAIT} /
+                $self->total_reads_num) * $HUNDRED;
+    }
     return;
 }
 
 =head2 near_bait_reads_percent
 
-
-Picard metrics :
-PF_UQ_READS_ALIGNED_NEAR_BAIT: The number of PF unique reads that dont overlap a bait but align within 250bp
-                                of a bait.
+ Picard metrics PF_UQ_READS_ALIGNED_NEAR_BAIT:
+ The number of PF unique reads that dont overlap a bait but align within 250bp
+ of a bait.
 
 =cut
 
 sub near_bait_reads_percent {
     my $self = shift;
 
-    if ($self->total_reads_num && defined $self->other_metrics->{PF_UQ_READS_ALIGNED_NEAR_BAIT}) {
-        return ($self->other_metrics->{PF_UQ_READS_ALIGNED_NEAR_BAIT} / $self->total_reads_num) * $HUNDRED;
+    if (defined $self->other_metrics && $self->total_reads_num &&
+        defined $self->other_metrics->{PF_UQ_READS_ALIGNED_NEAR_BAIT}) {
+        return ($self->other_metrics->{PF_UQ_READS_ALIGNED_NEAR_BAIT} /
+                $self->total_reads_num) * $HUNDRED;
     }
     return;
 }
 
 =head2 on_target_reads_percent
 
-Picard metrics:
-PF_UQ_READS_ALIGNED_TARGET:    The number of PF unique reads that are aligned overlapping a target by >= 1bp
+ Picard metrics PF_UQ_READS_ALIGNED_TARGET:
+ The number of PF unique reads that are aligned overlapping a target by >= 1bp
 
 =cut
 
 sub on_target_reads_percent {
     my $self = shift;
 
-    if ($self->total_reads_num && defined $self->other_metrics->{PF_UQ_READS_ALIGNED_TARGET}) {
-        return ($self->other_metrics->{PF_UQ_READS_ALIGNED_TARGET} / $self->total_reads_num) * $HUNDRED;
+    if (defined $self->other_metrics && $self->total_reads_num &&
+        defined $self->other_metrics->{PF_UQ_READS_ALIGNED_TARGET}) {
+        return ($self->other_metrics->{PF_UQ_READS_ALIGNED_TARGET} /
+                $self->total_reads_num) * $HUNDRED;
     }
     return;
 }
 
 =head2 selected_bases_percent
 
- (on_bait_bases_num + near_bait_bases_num) / [PF_BASES, PCT_SELECTED_BASES] in Picard metrics.
+ (on_bait_bases_num + near_bait_bases_num) / [PF_BASES, PCT_SELECTED_BASES]
+ in Picard metrics.
 
 =cut
 
 sub selected_bases_percent {
     my $self= shift;
-    if ($self->picard_version_base_count && defined $self->on_bait_bases_num && defined $self->near_bait_bases_num) {
-        return (($self->on_bait_bases_num + $self->near_bait_bases_num) / $self->picard_version_base_count) * $HUNDRED;
+    if ($self->picard_version_base_count && defined $self->on_bait_bases_num &&
+        defined $self->near_bait_bases_num) {
+        return (($self->on_bait_bases_num + $self->near_bait_bases_num) /
+                 $self->picard_version_base_count) * $HUNDRED;
     }
     return;
 }
 
 =head2 on_bait_bases_percent
 
-The percentage of aligned, de-duped, on-bait bases out of the PF bases available. PCT_USABLE_BASES_ON_BAIT in Picard metrics
+ The percentage of aligned, de-duped, on-bait bases out of the PF bases
+ available. PCT_USABLE_BASES_ON_BAIT in Picard metrics
 
 =cut
 
 sub on_bait_bases_percent {
     my $self = shift;
     if($self->picard_version_base_count && defined $self->on_bait_bases_num) {
-        return ($self->on_bait_bases_num / $self->picard_version_base_count) * $HUNDRED;
+        return ($self->on_bait_bases_num /
+                $self->picard_version_base_count) * $HUNDRED;
     }
     return;
 }
 
 =head2 near_bait_bases_percent
 
-The percentage of aligned, de-duped, on-bait bases out of the PF bases available.
+ The percentage of aligned, de-duped, on-bait bases out of the PF bases
+ available.
 
 =cut
 
 sub near_bait_bases_percent {
     my $self = shift;
     if($self->picard_version_base_count && defined $self->near_bait_bases_num) {
-        return ($self->near_bait_bases_num / $self->picard_version_base_count) * $HUNDRED;
+        return ($self->near_bait_bases_num /
+                $self->picard_version_base_count) * $HUNDRED;
     }
     return;
 }
 
 =head2 off_bait_bases_percent
 
-The percentage of aligned PF bases that mapped neither on or near a bait. PCT_OFF_BAIT in Picard metrics
+ The percentage of aligned PF bases that mapped neither on or near a bait.
+ PCT_OFF_BAIT in Picard metrics
 
 =cut
 
@@ -182,7 +195,7 @@ sub off_bait_bases_percent {
 
 =head2 on_bait_vs_selected_percent
 
-ON_BAIT_VS_SELECTED in Picard metrics
+ ON_BAIT_VS_SELECTED in Picard metrics
 
 =cut
 
@@ -199,14 +212,16 @@ sub  on_bait_vs_selected_percent {
 
 =head2 on_target_bases_percent
 
-The percentage of aligned, de-duped, on-target bases out of the PF bases available. PCT_USABLE_BASES_ON_TARGET in Picard metrics
+ The percentage of aligned, de-duped, on-target bases out of the PF bases
+ available. PCT_USABLE_BASES_ON_TARGET in Picard metrics
 
 =cut
 
 sub on_target_bases_percent {
     my $self = shift;
     if ($self->picard_version_base_count && defined $self->on_target_bases_num) {
-        return ($self->on_target_bases_num / $self->picard_version_base_count) * $HUNDRED;
+        return ($self->on_target_bases_num /
+                $self->picard_version_base_count) * $HUNDRED;
     }
     return;
 }
@@ -232,11 +247,10 @@ sub zero_coverage_targets_percent {
 sub target_bases_coverage_percent {
     my $self = shift;
     my $tbc = {};
-    if ($self->other_metrics) {
-        my @keys = keys %{$self->other_metrics};
-        @keys = grep {/^PCT_TARGET_BASES/smx} @keys;
+    if (defined $self->other_metrics) {
+        my @keys = grep {/^PCT_TARGET_BASES/smx} keys %{$self->other_metrics};
         foreach my $key (@keys) {
-        my ($coverage) = $key =~ /_(\d+)X/smx;
+            my ($coverage) = $key =~ /_(\d+)X/smx;
             $tbc->{$coverage} = $self->other_metrics->{$key} * $HUNDRED;
         }
     }
@@ -246,8 +260,6 @@ sub target_bases_coverage_percent {
 =head2 bait_bases_coverage_percent
 
 Various increments between PCT_BAIT_BASES_1X and PCT_BAIT_BASES_1000X
-to be stored in npgqc pulldown_metrics.other_metrics
-
 Represents the fraction of bait bases with a depth of >= Nx
 
 PCT_BAIT_BASES_2X
@@ -260,9 +272,8 @@ PCT_BAIT_BASES_30X
 sub bait_bases_coverage_percent {
     my $self = shift;
     my $bbc = {};
-    if ($self->other_metrics) {
-        my @keys = keys %{$self->other_metrics};
-        @keys = grep {/^PCT_BAIT_BASES/smx} @keys;
+    if (defined $self->other_metrics) {
+        my @keys = grep {/^PCT_BAIT_BASES/smx} keys %{$self->other_metrics};
         foreach my $key (@keys) {
             # e.g. PCT_BAIT_BASES_30X
             # multiply by a 100 as is not already a percentage, despite the name
@@ -271,7 +282,6 @@ sub bait_bases_coverage_percent {
         }
     }
 
-
     return $bbc;
 }
 
@@ -283,9 +293,8 @@ sub bait_bases_coverage_percent {
 sub hs_penalty {
     my $self = shift;
     my $penalty = {};
-    if ($self->other_metrics) {
-        my @keys = keys %{$self->other_metrics};
-        @keys = grep {/^HS_PENALTY/smx} @keys;
+    if (defined $self->other_metrics) {
+        my @keys = grep {/^HS_PENALTY/smx} keys %{$self->other_metrics};
         foreach my $key (@keys) {
         my ($coverage) = $key =~ /_(\d+)X/smx;
             $penalty->{$coverage} = $self->other_metrics->{$key};
@@ -309,7 +318,9 @@ PF_BASES instead.
 
 sub picard_version_base_count {
     my $self = shift;
-    return (exists $self->other_metrics->{PF_BASES}) ? $self->other_metrics->{PF_BASES} : $self->unique_bases_aligned_num;
+    return
+        (defined $self->other_metrics && exists $self->other_metrics->{PF_BASES})
+        ? $self->other_metrics->{PF_BASES} : $self->unique_bases_aligned_num;
 }
 
 
diff --git a/t/60-autoqc-db_loader.t b/t/60-autoqc-db_loader.t
index e90c75a7..cbe1c072 100644
--- a/t/60-autoqc-db_loader.t
+++ b/t/60-autoqc-db_loader.t
@@ -875,17 +875,30 @@ subtest 'loading review and other results from path' => sub {
 };
 
 subtest 'loading partially defined results' => sub {
-  plan tests => 2;
+  plan tests => 4;
  
-  my $db = $db_helper->create_test_db(q[npg_qc::Schema], 't/data/fixtures');
+  my $db = $db_helper->create_test_db(q[npg_qc::Schema]);
   my $db_loader = npg_qc::autoqc::db_loader->new(
     path    => ['t/data/autoqc/dbix_loader/short_results'],
     schema  => $db,
-    verbose => 0,
+    verbose => 0
   );
-  lives_ok { $db_loader->load() } 'no error loading an incomplete result';
+  lives_ok { $db_loader->load() }
+    'no error loading an incomplete genotype result';
   is ($db->resultset('Genotype')->search({})->count(), 1,
     'one genotype record is created');
+
+  $db_loader = npg_qc::autoqc::db_loader->new(
+    json_file =>
+      ['t/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json'],
+    schema    => $db,
+    verbose   => 0
+  );
+  lives_ok { $db_loader->load() }
+    'no error loading an incomplete pulldown_metrics result';
+  is ($db->resultset('PulldownMetrics')->search({})->count(), 1,
+    'one genotype record is created');
+ 
 };
 
 1;
diff --git a/t/60-autoqc-results-pulldown_metrics.t b/t/60-autoqc-results-pulldown_metrics.t
index ea895d03..e9c5a4a7 100644
--- a/t/60-autoqc-results-pulldown_metrics.t
+++ b/t/60-autoqc-results-pulldown_metrics.t
@@ -1,11 +1,6 @@
-#########
-# Author:        mg8
-# Created:       2 May 2012
-#
-
 use strict;
 use warnings;
-use Test::More tests => 10;
+use Test::More tests => 11;
 use Test::Exception;
 
 use_ok ('npg_qc::autoqc::results::pulldown_metrics');
@@ -41,4 +36,31 @@ use_ok ('npg_qc::autoqc::results::pulldown_metrics');
     cmp_ok(sprintf("%.1f", $pulldown->on_bait_bases_percent), '==', 61.0, 'Percentage on bait is calculated correctly');
 }
 
-1;
\ No newline at end of file
+subtest 'invoke methods for a partially defined result' => sub {
+  plan tests => 23;
+
+   my $pulldown;
+    lives_ok {
+        $pulldown = npg_qc::autoqc::results::pulldown_metrics->load(
+            't/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json'
+        );
+    } 'Load pulldown JSON with most data absent';
+    for my $method (qw/
+        bait_design_efficiency unique_reads_percent unique_reads_aligned_percent
+        on_bait_reads_percent near_bait_reads_percent on_target_reads_percent
+        selected_bases_percent on_bait_bases_percent near_bait_bases_percent
+        off_bait_bases_percent  on_bait_vs_selected_percent
+        on_target_bases_percent zero_coverage_targets_percent
+        target_bases_coverage_percent bait_bases_coverage_percent
+        bait_bases_coverage_percent hs_penalty picard_version_base_count
+    /) {
+        my $value;
+        lives_ok { $value = $pulldown->$method } "no error invoking '$method'";
+        if (defined $value) {
+            ok ((ref $value eq 'HASH') && (scalar keys %{$value} == 0),
+                q[if the value is defined, it's an empty hash]);
+        }
+    }
+};
+
+1;
diff --git a/t/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json b/t/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json
new file mode 100644
index 00000000..1f69beb0
--- /dev/null
+++ b/t/data/autoqc/pulldown_metrics/48367_2_2.pulldown_metrics.json
@@ -0,0 +1 @@
+{"__CLASS__":"npg_qc::autoqc::results::pulldown_metrics-71.1.0","comments":"Failed to find bait interval files in repository for TWIST Respiratory Virus Research Panel","composition":{"__CLASS__":"npg_tracking::glossary::composition-98.1.0","components":[{"__CLASS__":"npg_tracking::glossary::composition::component::illumina-98.1.0","id_run":48367,"position":2,"tag_index":2}]},"id_run":48367,"info":{"Check":"npg_qc::autoqc::checks::pulldown_metrics","Check_version":"71.1.0"},"pass":"0","position":2,"tag_index":2}
\ No newline at end of file