diff --git a/exceptions.py b/exceptions.py
new file mode 100644
index 0000000..d9e6dad
--- /dev/null
+++ b/exceptions.py
@@ -0,0 +1,7 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.exceptions import UserError
+
+class InvalidNumberPurchases(UserError):
+    pass
diff --git a/message.xml b/message.xml
new file mode 100644
index 0000000..b7d0dbf
--- /dev/null
+++ b/message.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+
+<tryton>
+    <data grouped="1">
+	<record model="ir.message" id="msg_invalid_number_purchases">
+            <field name="text">Please, select only one purchase.</field>
+        </record>
+    </data>
+</tryton>
diff --git a/product.py b/product.py
index 8012d5f..d23389d 100644
--- a/product.py
+++ b/product.py
@@ -57,7 +57,7 @@ class Template(metaclass=PoolMeta):
     useful_life = fields.Char(
         "Useful life", size=None)
     warranty = fields.Char(
-        "Warranty", size=None)
+        "Warranty")
     serial = fields.Char(
         "Serial", size=None)
     health_register = fields.Char(
diff --git a/purchase.py b/purchase.py
index 68efbb7..d75e41e 100644
--- a/purchase.py
+++ b/purchase.py
@@ -2,11 +2,60 @@
 #txhis repository contains the full copyright notices and license terms
 from trytond.pool import Pool, PoolMeta
 from trytond.model import ModelView, ModelSQL, fields
+from trytond.pyson import Eval
 from trytond.exceptions import UserError
+from trytond.i18n import gettext
+from .exceptions import (
+    InvalidNumberPurchases)
 
 class Purchase(metaclass=PoolMeta):
     __name__ = 'purchase.purchase'
 
+    equipment_available = fields.Boolean("Equipments Availables", readonly=True)
+
+    @classmethod
+    def __setup__(cls):
+        super(Purchase, cls).__setup__()
+        cls._buttons.update({
+            'create_equipments': {
+                'invisible': Eval('equipment_avalaible')},
+        })
+
+    
+    @classmethod
+    @ModelView.button
+    def create_equipments(cls, purchases):
+        if len(purchases) > 1:
+            raise InvalidNumberPurchases(
+                gettext('purchase.msg_invalid_number_purchases'))
+        else:
+            pool = Pool()
+            Equipment = pool.get('optical_equipment.equipment')
+            Line = pool.get('purchase.line')
+            lines = []
+            purchase = purchases[0]
+            
+            for line in purchase.lines:
+                equipment = Equipment(
+                        company=line.company,
+                        equipment_type=line.product.equipment_type,
+                        party_address=line.address_equipment,
+                        product=line.product,
+                        risk=line.product.risk,
+                        use=line.product.use,
+                        biomedical_class=line.product.biomedical_class,
+                        calibration=line.product.calibration,
+                        refurbish=line.refurbish,
+                        serial=line.serial_equipment,
+                        software_version=line.product.software_version)
+
+                equipment.save()
+            purchase.equipment_available = True
+            cls.save(purchases)
+
+
+            
+    """
     @classmethod
     @ModelView.button
     def process(cls, purchases):
@@ -18,7 +67,7 @@ class Purchase(metaclass=PoolMeta):
         process, done = [], []
         cls.lock(purchases)
         for purchase in purchases:
-            """if purchase.state not in {'confirmed', 'processing', 'done'}:
+            if purchase.state not in {'confirmed', 'processing', 'done'}:
                 continue
             purchase.create_invoice()
             purchase.set_invoice_state()
@@ -27,7 +76,6 @@ class Purchase(metaclass=PoolMeta):
             if return_moves:
                 purchase.create_return_shipment(return_moves)
             purchase.set_shipment_state()
-            """
             #raise UserError(str(dir(purchase)))
             #equipment = Equipment() 
             for line in purchase.lines:
@@ -47,7 +95,7 @@ class Purchase(metaclass=PoolMeta):
                 )
                 equipment.save()
                 #raise UserError(str([equipment.serial, equipment.software_version]))
-            """  line.set_actual_quantity()
+                line.set_actual_quantity()
                 lines.append(line)
                 
             if purchase.is_done():
@@ -61,7 +109,8 @@ class Purchase(metaclass=PoolMeta):
         if process:
             cls.proceed(process)
         if done:
-            cls.do(done)"""
+            cls.do(done)
+        """
             
 class Line(metaclass=PoolMeta):
     __name__ = 'purchase.line'
diff --git a/purchase.xml b/purchase.xml
index 88f41a7..dcbaaff 100644
--- a/purchase.xml
+++ b/purchase.xml
@@ -8,5 +8,15 @@ this repository contains the full copyright notices and license terms. -->
             <field name="inherit" ref="purchase.purchase_line_view_form"/>
             <field name="name">purchase_line_form</field>
         </record>
+	<record model="ir.ui.view" id="purchase_view_form">
+            <field name="model">purchase.purchase</field>
+            <field name="inherit" ref="purchase.purchase_view_form"/>
+            <field name="name">purchase_form</field>
+        </record>
+	<record model="ir.model.button" id="purchase_create_equipments">
+	    <field name="name">create_equipments</field>
+	    <field name="string">Create Equipments</field>
+	    <field name="model" search="[('model', '=', 'purchase.purchase')]"/>
+	</record>
     </data>
 </tryton>
diff --git a/view/purchase_form.xml b/view/purchase_form.xml
new file mode 100644
index 0000000..d2adb11
--- /dev/null
+++ b/view/purchase_form.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!--This file file is part of Tryton. The COPYRIGHT file at the top level of this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath
+	expr="/form/notebook/page[@id='info']/separator[@name='comment']"
+	position="before">
+	    <label name="equipment_available"/>
+	    <field name="equipment_available"/>
+    </xpath>
+</data>