diff --git a/app/models/service_template_transformation_plan_task.rb b/app/models/service_template_transformation_plan_task.rb
index 3b3bc58b00c..54edea0db47 100644
--- a/app/models/service_template_transformation_plan_task.rb
+++ b/app/models/service_template_transformation_plan_task.rb
@@ -256,11 +256,12 @@ def calculate_network_mappings
       source_network = nic.lan
       destination_network = transformation_destination(source_network)
       raise "[#{source.name}] NIC #{nic.device_name} [#{source_network.name}] has no mapping." if destination_network.nil?
+      raise "[#{source.name}] NIC #{nic.device_name} [#{source_network.name}] has an empty IP address." if nic.network.try(:ipaddress).nil?
       {
         :source      => source_network.name,
         :destination => destination_network_ref(destination_network),
         :mac_address => nic.address,
-        :ip_address  => nic.network.try(:ipaddress)
+        :ip_address  => nic.network.ipaddress
       }
     end
   end
diff --git a/spec/models/service_template_transformation_plan_task_spec.rb b/spec/models/service_template_transformation_plan_task_spec.rb
index deec3bf1b57..b5e557ef22c 100644
--- a/spec/models/service_template_transformation_plan_task_spec.rb
+++ b/spec/models/service_template_transformation_plan_task_spec.rb
@@ -304,7 +304,9 @@
       let(:src_vm_1) { FactoryBot.create(:vm_vmware, :ext_management_system => src_ems, :ems_cluster => src_cluster, :host => src_host, :hardware => src_hardware) }
       let(:src_vm_2) { FactoryBot.create(:vm_vmware, :ext_management_system => src_ems, :ems_cluster => src_cluster, :host => src_host) }
 
-      let(:src_network) { FactoryBot.create(:network, :ipaddress => '10.0.0.1') }
+      let(:src_network_1) { FactoryBot.create(:network, :ipaddress => '10.0.1.1') }
+      let(:src_network_2a) { FactoryBot.create(:network, :ipaddress => '10.0.1.2') }
+      let(:src_network_2b) { FactoryBot.create(:network, :ipaddress => nil) }
 
       # Disks have to be stubbed because there's no factory for Disk class
       before do
@@ -312,7 +314,7 @@
         allow(src_disk_1).to receive(:storage).and_return(src_storage)
         allow(src_disk_2).to receive(:storage).and_return(src_storage)
         allow(src_vm_1).to receive(:allocated_disk_storage).and_return(34_359_738_368)
-        allow(src_nic_1).to receive(:network).and_return(src_network)
+        allow(src_nic_1).to receive(:network).and_return(src_network_1)
         allow(src_host).to receive(:thumbprint_sha1).and_return('01:23:45:67:89:ab:cd:ef:01:23:45:67:89:ab:cd:ef:01:23:45:67')
         allow(src_host).to receive(:authentication_userid).and_return('esx_user')
         allow(src_host).to receive(:authentication_password).and_return('esx_passwd')
@@ -438,19 +440,27 @@
 
         before do
           task_1.conversion_host = conversion_host
+          allow(src_nic_2).to receive(:network).and_return(src_network_2a)
         end
 
         it { expect(task_1.destination_cluster).to eq(dst_cluster) }
 
         it_behaves_like "#virtv2v_disks"
 
-        it "checks network mappings and generates network_mappings hash" do
-          expect(task_1.network_mappings).to eq(
-            [
-              { :source => src_lan_1.name, :destination => dst_lan_1.name, :mac_address => src_nic_1.address, :ip_address => '10.0.0.1' },
-              { :source => src_lan_2.name, :destination => dst_lan_2.name, :mac_address => src_nic_2.address, :ip_address => nil }
-            ]
-          )
+        context "#network_mappings" do
+          it "generates network_mappings hash" do
+            expect(task_1.network_mappings).to eq(
+              [
+                { :source => src_lan_1.name, :destination => dst_lan_1.name, :mac_address => src_nic_1.address, :ip_address => '10.0.1.1' },
+                { :source => src_lan_2.name, :destination => dst_lan_2.name, :mac_address => src_nic_2.address, :ip_address => '10.0.1.2' }
+              ]
+            )
+          end
+
+          it "fails if network IP address is nil" do
+            allow(src_nic_2).to receive(:network).and_return(src_network_2b)
+            expect { task_1.network_mappings }.to raise_error("[#{src_vm_1.name}] NIC #{src_nic_2.device_name} [#{src_lan_2.name}] has an empty IP address.")
+          end
         end
 
         context "transport method is vddk" do
@@ -508,6 +518,8 @@
         let(:dst_cloud_volume_type) { FactoryBot.create(:cloud_volume_type) }
         let(:dst_cloud_network_1) { FactoryBot.create(:cloud_network) }
         let(:dst_cloud_network_2) { FactoryBot.create(:cloud_network) }
+        let(:dst_net_1) { dst_cloud_network_1 }
+        let(:dst_net_2) { dst_cloud_network_2 }
         let(:dst_flavor) { FactoryBot.create(:flavor) }
         let(:dst_security_group) { FactoryBot.create(:security_group) }
         let(:conversion_host_vm) { FactoryBot.create(:vm_openstack, :ext_management_system => dst_ems, :cloud_tenant => dst_cloud_tenant) }
@@ -527,19 +539,27 @@
 
         before do
           task_1.conversion_host = conversion_host
+          allow(src_nic_2).to receive(:network).and_return(src_network_2a)
         end
 
         it { expect(task_1.destination_cluster).to eq(dst_cloud_tenant) }
 
         it_behaves_like "#virtv2v_disks"
 
-        it "checks network mappings and generates network_mappings hash" do
-          expect(task_1.network_mappings).to eq(
-            [
-              { :source => src_lan_1.name, :destination => dst_cloud_network_1.ems_ref, :mac_address => src_nic_1.address, :ip_address => '10.0.0.1' },
-              { :source => src_lan_2.name, :destination => dst_cloud_network_2.ems_ref, :mac_address => src_nic_2.address, :ip_address => nil }
-            ]
-          )
+        context "#network_mappings" do
+          it "generates network_mappings hash" do
+            expect(task_1.network_mappings).to eq(
+              [
+                { :source => src_lan_1.name, :destination => dst_cloud_network_1.ems_ref, :mac_address => src_nic_1.address, :ip_address => '10.0.1.1' },
+                { :source => src_lan_2.name, :destination => dst_cloud_network_2.ems_ref, :mac_address => src_nic_2.address, :ip_address => '10.0.1.2' }
+              ]
+            )
+          end
+
+          it "fails if network IP address is nil" do
+            allow(src_nic_2).to receive(:network).and_return(src_network_2b)
+            expect { task_1.network_mappings }.to raise_error("[#{src_vm_1.name}] NIC #{src_nic_2.device_name} [#{src_lan_2.name}] has an empty IP address.")
+          end
         end
 
         context "transport method is vddk" do