diff --git a/plm/__manifest__.py b/plm/__manifest__.py
index 3b55af3c..b052cb6e 100644
--- a/plm/__manifest__.py
+++ b/plm/__manifest__.py
@@ -21,7 +21,7 @@
 ##############################################################################
 {
     "name": "Product Lifecycle Management",
-    "version": "18.0.1.0.0",
+    "version": "18.0.2.0.0",
     "author": "OmniaSolutions",
     "website": "https://odooplm.omniasolutions.website",
     "category": "Manufacturing/Product Lifecycle Management (PLM)",
diff --git a/plm/models/plm_mixin.py b/plm/models/plm_mixin.py
index a89052fa..f14739e4 100644
--- a/plm/models/plm_mixin.py
+++ b/plm/models/plm_mixin.py
@@ -60,8 +60,6 @@
 UPPERCASE_LETTERS = [
     chr(i) for i in range(ord('A'), ord('Z') + 1)
 ]
-
-
 #
 def convert_to_letter(l, n):
     n_o_w = len(l)
@@ -71,9 +69,6 @@ def convert_to_letter(l, n):
     else:
         out = l[n]
     return out
-
-
-#
 #
 class RevisionBaseMixin(models.AbstractModel):
     _name = 'revision.plm.mixin'
@@ -81,7 +76,8 @@ class RevisionBaseMixin(models.AbstractModel):
     _description = 'Revision Mixin'
 
     engineering_code = fields.Char(string="Engineering Code")
-    engineering_revision = fields.Integer(string="Engineering Revision index")
+    engineering_revision = fields.Integer(string="Engineering Revision index",
+                                          default=0)
     engineering_revision_letter = fields.Char(
         string="Engineering Revision letter",
         default="A"
diff --git a/plm_pdf_workorder/models/mrp_routing_workcenter.py b/plm_pdf_workorder/models/mrp_routing_workcenter.py
index 442f1c68..d61ea8d4 100755
--- a/plm_pdf_workorder/models/mrp_routing_workcenter.py
+++ b/plm_pdf_workorder/models/mrp_routing_workcenter.py
@@ -32,6 +32,11 @@ class MrpRoutingWorkcenter(models.Model):
     use_plm_pdf = fields.Boolean(_("Use PLM PDF"))
     plm_pdf = fields.Binary(_("Plm PDF"), compute="_compute_plm_pdf_data")
 
+    def refresh_plm_instruction_pdf(self):
+        self.ensure_one()
+        for workorder_id in self.workorder_ids.filtered(lambda x: x.use_plm_pdf):
+            workorder_id.refresh_plm_instruction_pdf()
+
     def _compute_plm_pdf_data(self):
         workorder_id = self.env["mrp.workorder"].search([
             ("operation_id", "in", self.ids)
diff --git a/plm_pdf_workorder/models/mrp_workorder.py b/plm_pdf_workorder/models/mrp_workorder.py
index 82c2a4dd..3e5182ce 100755
--- a/plm_pdf_workorder/models/mrp_workorder.py
+++ b/plm_pdf_workorder/models/mrp_workorder.py
@@ -70,13 +70,19 @@ def action_switch_pdf(self):
     def create(self, vals):
         ret = super(MrpWorkorder, self).create(vals)
         for r in ret:
-            if r.operation_id.use_plm_pdf:
-                r.plm_pdf = base64.b64encode(self.getPDF(r))
+            r.refresh_plm_instruction_pdf()
         return ret
 
-    def getPDF(self, workorder_id):
+    def refresh_plm_instruction_pdf(self):
+        self.ensure_one()
+        if self.operation_id.use_plm_pdf:
+            self.plm_pdf = base64.b64encode(self.getAttachmentWorkorderPDF())
+        
+    def getAttachmentWorkorderPDF(self):
+        self.ensure_one()
         report_model = self.env["report.plm.product_production_one_pdf_latest"]
-        return report_model._render_qweb_pdf(workorder_id.product_id, checkState=True)
+        return report_model._render_qweb_pdf(self.product_id,
+                                            checkState=True)
 
     def fetch_release_attachment(self, workorder_id):
         if self.view_plm_pdf:
diff --git a/plm_pdf_workorder/views/mrp_routing_workcenter.xml b/plm_pdf_workorder/views/mrp_routing_workcenter.xml
index 159e6acf..c23a9fe9 100755
--- a/plm_pdf_workorder/views/mrp_routing_workcenter.xml
+++ b/plm_pdf_workorder/views/mrp_routing_workcenter.xml
@@ -8,6 +8,9 @@
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='worksheet_type']" position="before">
                     <field name="use_plm_pdf"/>
+                    <button name="refresh_plm_instruction_pdf"
+                            type="object"
+                            icon="fa-refresh"/>
                     <field name="plm_pdf" invisible="use_plm_pdf == False" widget="pdf_viewer"/>
                 </xpath>
                 <xpath expr="//field[@name='worksheet_type']" position="attributes">
diff --git a/plm_pdf_workorder/views/mrp_workorder.xml b/plm_pdf_workorder/views/mrp_workorder.xml
index c42866e6..97d90679 100755
--- a/plm_pdf_workorder/views/mrp_workorder.xml
+++ b/plm_pdf_workorder/views/mrp_workorder.xml
@@ -10,6 +10,9 @@
                     <group>
                         <group>
                             <field name="view_plm_pdf" string="View PLM PDF" invisible="1"/>
+                            <button name="refresh_plm_instruction_pdf"
+                                    type="object"
+                                    icon="fa-refresh"/>
                         </group>
                         <group>
                             <field name="use_plm_pdf" string="Use PLM PDF" invisible="1"/>