diff --git a/lib/syspro.rb b/lib/syspro.rb
index ee4cc4e..dfa2a8d 100644
--- a/lib/syspro.rb
+++ b/lib/syspro.rb
@@ -34,6 +34,7 @@ require 'syspro/business_objects/portor'
 require 'syspro/business_objects/portoi'
 require 'syspro/business_objects/porqry'
 require 'syspro/business_objects/comsfm'
+require 'syspro/business_objects/invsws'
 require 'syspro/business_objects/invqry'
 
 require 'syspro/business_objects/models/sor'
@@ -48,6 +49,7 @@ require 'syspro/business_objects/models/purchase_orders/freight_line'
 require 'syspro/business_objects/models/purchase_orders/misc_charge_line'
 require 'syspro/business_objects/models/purchase_orders/comment_line'
 require 'syspro/business_objects/models/comsfm_item'
+require 'syspro/business_objects/models/invsws_item'
 require 'syspro/business_objects/models/inv'
 
 require 'syspro/business_objects/parsers/combrw_parser'
@@ -57,6 +59,7 @@ require 'syspro/business_objects/parsers/sorqry_parser'
 require 'syspro/business_objects/parsers/portor_parser'
 require 'syspro/business_objects/parsers/portoi_parser'
 require 'syspro/business_objects/parsers/comsfm_parser'
+require 'syspro/business_objects/parsers/invsws_parser'
 require 'syspro/business_objects/parsers/invqry_parser'
 
 # Main Module
diff --git a/lib/syspro/business_objects/comsfm.rb b/lib/syspro/business_objects/comsfm.rb
index 8d337fc..158e2f5 100644
--- a/lib/syspro/business_objects/comsfm.rb
+++ b/lib/syspro/business_objects/comsfm.rb
@@ -12,7 +12,7 @@ module Syspro
       attr_accessor :validate_only,
                     :items
 
-      def call(user_id)
+      def add(user_id)
         xml_parameters = params_template.result(binding)
         xml_in = template.result(binding)
         business_object = 'COMSFM'
diff --git a/lib/syspro/business_objects/invsws.rb b/lib/syspro/business_objects/invsws.rb
new file mode 100644
index 0000000..765d46d
--- /dev/null
+++ b/lib/syspro/business_objects/invsws.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'syspro/business_objects/parsers/invsws_parser'
+require 'erb'
+
+module Syspro
+  module BusinessObjects
+    class InvSws < ApiResource
+      include Syspro::ApiOperations::Setup
+      include Syspro::BusinessObjects::Parsers
+
+      attr_accessor :validate_only,
+                    :apply_product_class_default,
+                    :ignore_warnings,
+                    :apply_if_entire_document_valid,
+                    :item
+
+      def add(user_id)
+        xml_parameters = params_template.result(binding)
+        xml_in = template.result(binding)
+        business_object = 'INVSWS'
+        params = { 'UserId' => user_id,
+          'BusinessObject' => business_object,
+          'XmlParameters' => xml_parameters,
+          'XmlIn' => xml_in }
+        resp = InvSws.add(params)
+
+        parse_response(resp)
+      end
+
+      def template
+        ERB.new File.read(File.expand_path('schemas/invsws_doc.xml.erb', File.dirname(__FILE__))), nil, '%'
+      end
+
+      def params_template
+        ERB.new File.read(File.expand_path('schemas/invsws.xml.erb', File.dirname(__FILE__))), nil, '%'
+      end
+
+      def parse_response(resp)
+        handle_errors(resp)
+        parser = InvSwsParser.new(resp[0].data)
+        parser.parse
+      end
+
+      def render_xml(inner_text, dflt_value = "")
+        inner_text ? inner_text.to_s : dflt_value
+      end
+    end
+  end
+end
diff --git a/lib/syspro/business_objects/models/invsws_item.rb b/lib/syspro/business_objects/models/invsws_item.rb
new file mode 100644
index 0000000..30367a8
--- /dev/null
+++ b/lib/syspro/business_objects/models/invsws_item.rb
@@ -0,0 +1,47 @@
+module Syspro
+  module BusinessObjects
+    module Models
+      class InvSwsItem
+        attr_accessor :key_stock_code,
+                      :key_warehouse,
+                      :cost_multiplier,
+                      :minimum_qty,
+                      :maximum_qty,
+                      :unit_cost,
+                      :default_bin,
+                      :safety_stock_qty,
+                      :re_order_qty,
+                      :pallet_qty,
+                      :user_field1,
+                      :user_field2,
+                      :user_field3,
+                      :order_policy,
+                      :major_order_mult,
+                      :minor_order_mult,
+                      :order_minimum,
+                      :order_maximum,
+                      :order_fix_period,
+                      :trf_supplied_item,
+                      :default_source_wh,
+                      :trf_lead_time,
+                      :trf_cost_gl_code,
+                      :trf_cost_multiply,
+                      :trf_replenish_wh,
+                      :trf_buying_rule,
+                      :trf_dock_to_stock,
+                      :trf_fix_time_period,
+                      :labour_cost,
+                      :material_cost,
+                      :fixed_overhead,
+                      :variable_overhead,
+                      :sub_contract_cost,
+                      :manual_cost_flag,
+                      :e_signature
+        end
+
+        class InvSwsItemKey
+          attr_accessor
+        end
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/syspro/business_objects/parsers/invsws_parser.rb b/lib/syspro/business_objects/parsers/invsws_parser.rb
new file mode 100644
index 0000000..ee00298
--- /dev/null
+++ b/lib/syspro/business_objects/parsers/invsws_parser.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Syspro
+  module BusinessObjects
+    module Parsers
+      class InvSwsParser
+        attr_reader :doc
+
+        def initialize(doc)
+          @doc = doc
+        end
+
+        def parse
+          {
+            "key": {
+              "stock_code": doc.xpath("//item/key/stockcode").map{|e| e.text}.first,
+              "warehouse": doc.xpath("//item/key/stockcode").map{|e| e.text}.first
+            },
+            "reacords_read": doc.xpath("//StatusOfItems/RecordsRead").map{|e| e.text}.first,
+            "reacords_invalid": doc.xpath("//StatusOfItems/RecordsInvalid").map{|e| e.text}.first,
+            "error_numbers": doc.xpath("//ErrorNumber").map{|e| e.text}
+          }
+        end
+      end
+    end
+  end
+end
+
diff --git a/lib/syspro/business_objects/schemas/invsws.xml.erb b/lib/syspro/business_objects/schemas/invsws.xml.erb
new file mode 100644
index 0000000..e9ee74d
--- /dev/null
+++ b/lib/syspro/business_objects/schemas/invsws.xml.erb
@@ -0,0 +1,8 @@
+<SetupInvWarehouse xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance" xsd:noNamespaceSchemaLocation="INVSWS.XSD">
+  <Parameters>
+    <ApplyProductClassDefault><%= render_xml(@apply_product_class_default, "BA") %></ApplyProductClassDefault>
+    <IgnoreWarnings><%= render_xml(@ignore_warnings, "N") %></IgnoreWarnings>
+    <ApplyIfEntireDocumentValid><%= render_xml(@apply_if_entire_document_valid, "Y") %></ApplyIfEntireDocumentValid>
+    <ValidateOnly><%= render_xml(@validate_only, "N") %></ValidateOnly>
+  </Parameters>
+</SetupInvWarehouse>
diff --git a/lib/syspro/business_objects/schemas/invsws_doc.xml.erb b/lib/syspro/business_objects/schemas/invsws_doc.xml.erb
new file mode 100644
index 0000000..b4a6c37
--- /dev/null
+++ b/lib/syspro/business_objects/schemas/invsws_doc.xml.erb
@@ -0,0 +1,43 @@
+<SetupInvWarehouse xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance" xsd:noNamespaceSchemaLocation="INVSWSDOC.XSD">
+  <Item>
+    <Key>
+      <StockCode><%= render_xml(@item.key_stock_code) %></StockCode>
+      <Warehouse><%= render_xml(@item.key_warehouse) %></Warehouse>
+    </Key>
+    <CostMultiplier><%= render_xml(@item.cost_multiplier, "1.0") %></CostMultiplier>
+    <MinimumQty><%= render_xml(@item.minimum_qty) %></MinimumQty>
+    <MaximumQty><%= render_xml(@item.maximum_qty) %></MaximumQty>
+    <UnitCost><%= render_xml(@item.unit_cost) %></UnitCost>
+    <DefaultBin><%= render_xml(@item.default_bin, "FG") %></DefaultBin>
+    <SafetyStockQty><%= render_xml(@item.safety_stock_qty) %></SafetyStockQty>
+    <ReOrderQty><%= render_xml(@item.re_order_qty) %></ReOrderQty>
+    <PalletQty><%= render_xml(@item.pallet_qty) %></PalletQty>
+    <UserField1><%= render_xml(@item.user_field1) %></UserField1>
+    <UserField2><%= render_xml(@item.user_field2) %></UserField2>
+    <UserField3><%= render_xml(@item.user_field3) %></UserField3>
+    <OrderPolicy><%= render_xml(@item.order_policy, "C") %></OrderPolicy>
+    <MajorOrderMult><%= render_xml(@item.major_order_mult) %></MajorOrderMult>
+    <MinorOrderMult><%= render_xml(@item.minor_order_mult) %></MinorOrderMult>
+    <OrderMinimum><%= render_xml(@item.order_minimum) %></OrderMinimum>
+    <OrderMaximum><%= render_xml(@item.order_maximum) %></OrderMaximum>
+    <OrderFixPeriod><%= render_xml(@item.order_fix_period, "01") %></OrderFixPeriod>
+    <TrfSuppliedItem><%= render_xml(@item.trf_supplied_item, "N") %></TrfSuppliedItem>
+    <DefaultSourceWh><%= render_xml(@item.default_source_wh) %></DefaultSourceWh>
+    <TrfLeadTime><%= render_xml(@item.trf_lead_time, "0") %></TrfLeadTime>
+    <TrfCostGlCode><%= render_xml(@item.trf_cost_gl_code) %></TrfCostGlCode>
+    <TrfCostMultiply><%= render_xml(@item.trf_cost_multiply) %></TrfCostMultiply>
+    <TrfReplenishWh><%= render_xml(@item.trf_replenish_wh, "0") %></TrfReplenishWh>
+    <TrfBuyingRule><%= render_xml(@item.trf_buying_rule, "A") %></TrfBuyingRule>
+    <TrfDockToStock><%= render_xml(@item.trf_dock_to_stock) %></TrfDockToStock>
+    <TrfFixTimePeriod><%= render_xml(@item.trf_fix_time_period) %></TrfFixTimePeriod>
+    <LabourCost><%= render_xml(@item.labour_cost) %></LabourCost>
+    <MaterialCost><%= render_xml(@item.material_cost) %></MaterialCost>
+    <FixedOverhead><%= render_xml(@item.fixed_overhead) %></FixedOverhead>
+    <VariableOverhead><%= render_xml(@item.variable_overhead) %></VariableOverhead>
+    <SubContractCost><%= render_xml(@item.sub_contract_cost) %></SubContractCost>
+    <ManualCostFlag><%= render_xml(@item.manual_cost_flag, "N") %></ManualCostFlag>
+    <% if @item.e_signature %>
+    <eSignature><%= render_xml(@item.e_signature) %></eSignature>
+    <% end %>
+  </Item>
+</SetupInvWarehouse>
\ No newline at end of file
diff --git a/test/comsfm_test.rb b/test/comsfm_test.rb
index 32e1708..c969b6c 100644
--- a/test/comsfm_test.rb
+++ b/test/comsfm_test.rb
@@ -24,7 +24,7 @@ class ComsFmTest < Minitest::Test
     cust_form.validate_only = "Y"
     cust_form.items = [cust_item]
 
-    errors = cust_form.call(user_id.guid)
+    errors = cust_form.add(user_id.guid)
 
     assert_equal errors.length, 0
   end
diff --git a/test/invsws_test.rb b/test/invsws_test.rb
new file mode 100644
index 0000000..ff6becf
--- /dev/null
+++ b/test/invsws_test.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class ComsFmTest < Minitest::Test
+  extend Minitest::Spec::DSL
+
+  let(:username) { ENV['SYSPRO_USERNAME'] }
+  let(:password) { ENV['SYSPRO_PASSWORD'] }
+  let(:company) { ENV['SYSPRO_COMPANY'] }
+  let(:company_password) { '' }
+  let(:user_id) do
+    Syspro::Logon.logon(username, password, company, company_password)
+  end
+
+  def test_comsfm
+    invsws_item = Syspro::BusinessObjects::Models::InvSwsItem.new
+    invsws_item.key_stock_code = "1003"
+    invsws_item.key_warehouse = "P0"
+    invsws_item.default_bin = "P0"
+
+    invsws_req = Syspro::BusinessObjects::InvSws.new
+    invsws_req.validate_only = "Y"
+    invsws_req.apply_product_class_default = "BA"
+    invsws_req.ignore_warnings = "N"
+    invsws_req.apply_if_entire_document_valid = "Y"
+    invsws_req.item = invsws_item
+
+    invsws_resp = invsws_req.add(user_id.guid)
+    
+    assert_equal invsws_resp[:error_numbers].length, 0
+  end
+end
\ No newline at end of file
--
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