diff --git a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/exception/IExceptionMessage.java b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/exception/IExceptionMessage.java
index e0fc4dd..aa80bf2 100644
--- a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/exception/IExceptionMessage.java
+++ b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/exception/IExceptionMessage.java
@@ -72,4 +72,6 @@ public interface IExceptionMessage {
       "Please enter supplier for following purchase request : %s" /*)*/;
   public static final String TCO = /*$$(*/
       "CTO not validated for products :  %s" /*)*/;
+      public static final String NO_TCO = /*$$(*/
+      "CTO not present for products :  %s" /*)*/;
 }
diff --git a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderService.java b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderService.java
index 952d63d..46e06e4 100644
--- a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderService.java
+++ b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderService.java
@@ -110,6 +110,8 @@ public interface PurchaseOrderService {
 
   public void validatePurchaseOrder(PurchaseOrder purchaseOrder) throws AxelorException, MalformedURLException, JSONException;
 
+  public void checkTcoToApprove(PurchaseOrder purchaseOrder) throws AxelorException;
+
   public void finishPurchaseOrder(PurchaseOrder purchaseOrder);
 
   public void cancelPurchaseOrder(PurchaseOrder purchaseOrder);
diff --git a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderServiceImpl.java b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderServiceImpl.java
index 1f4c25b..8d908c7 100644
--- a/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderServiceImpl.java
+++ b/modules/axelor-open-suite/axelor-purchase/src/main/java/com/axelor/apps/purchase/service/PurchaseOrderServiceImpl.java
@@ -307,6 +307,7 @@ public class PurchaseOrderServiceImpl implements PurchaseOrderService {
   @Override
   @Transactional(rollbackOn = {Exception.class})
   public void requestPurchaseOrder(PurchaseOrder purchaseOrder) throws AxelorException {
+    this.checkTcoToApprove(purchaseOrder);
     purchaseOrder.setStatusSelect(PurchaseOrderRepository.STATUS_REQUESTED);
     Partner partner = purchaseOrder.getSupplierPartner();
     Company company = purchaseOrder.getCompany();
@@ -609,6 +610,37 @@ public class PurchaseOrderServiceImpl implements PurchaseOrderService {
    
   }
 
+  public void checkTcoToApprove(PurchaseOrder purchaseOrder)  throws AxelorException{
+    /*vérifier si tous les tco sont validées */
+    javax.persistence.Query dateQuery =
+        com.axelor
+            .db
+            .JPA
+            .em()
+            .createNativeQuery("SELECT A.product "+
+            "FROM PURCHASE_PURCHASE_ORDER_LINE AS A "+
+            "LEFT JOIN PUBLIC.SUPPLIERMANAGEMENT_PURCHASE_ORDER_SUPPLIER_LINE AS B "+
+            "ON A.ID = B.PURCHASE_ORDER_LINE "+
+            "WHERE A.PURCHASE_ORDER = "+purchaseOrder.getId()+" AND (A.ARCHIVED IS NOT TRUE OR B.ARCHIVED IS NOT TRUE) and B.ID is null "+
+            "GROUP BY A.ID, B.ID");
+	  List<BigInteger> productsResult = dateQuery.getResultList();	
+  		
+    
+      List<String> products = new ArrayList<>();
+      for (BigInteger id : productsResult) {
+        Product product = Beans.get(ProductRepository.class).find(id.longValue());
+        products.add(product.getFullName());
+      }
+
+      if(products.size() > 0){
+
+              throw new AxelorException(
+                        TraceBackRepository.CATEGORY_CONFIGURATION_ERROR,
+                        I18n.get(IExceptionMessage.NO_TCO),products);    
+      }
+   
+  }
+
 
 
   @Transactional