Fix for 2854 - ConditionRefreshAsync always results in BadNodeIdUnknown

Libraries/Opc.Ua.Client/Subscription/Subscription.cs

@@ -1663,6 +1663,33 @@
             return false;
         }
 
+        /// <summary>
+        /// Tells the server to refresh all conditions being monitored by the subscription for a specific
+        /// monitoredItem for events.
+        /// </summary>
+        public bool ConditionRefresh2(uint monitoredItemId)
+        {
+            VerifySubscriptionState(true);
+
+            try
+            {
+                object[] inputArguments = new object[] { m_id, monitoredItemId };
+
+                m_session.Call(
+                    ObjectTypeIds.ConditionType,
+                    MethodIds.ConditionType_ConditionRefresh2,
+                    inputArguments);
+
+                return true;
+            }
+            catch (ServiceResultException sre)
+            {
+                Utils.LogError(sre, "SubscriptionId {0}: Item {1} Failed to call ConditionRefresh2 on server",
+                    m_id, monitoredItemId);
+            }
+            return false;
+        }
+
         /// <summary>
         /// Call the ResendData method on the server for this subscription.
         /// </summary>

Libraries/Opc.Ua.Client/Subscription/SubscriptionAsync.cs

@@ -454,6 +454,7 @@
 
             var methodsToCall = new CallMethodRequestCollection();
             methodsToCall.Add(new CallMethodRequest() {
+                ObjectId = ObjectTypeIds.ConditionType,
                 MethodId = MethodIds.ConditionType_ConditionRefresh,
                 InputArguments = new VariantCollection() { new Variant(m_id) }
             });
@@ -464,6 +465,29 @@
                 ct).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// Tells the server to refresh all conditions being monitored by the subscription for a specific
+        /// monitoredItem for events.
+        /// </summary>
+        public async Task ConditionRefresh2Async(uint monitoredItemId, CancellationToken ct = default)
+        {
+            VerifySubscriptionState(true);
+
+            var methodsToCall = new CallMethodRequestCollection();
+            methodsToCall.Add(new CallMethodRequest() {
+                ObjectId = ObjectTypeIds.ConditionType,
+                MethodId = MethodIds.ConditionType_ConditionRefresh2,
+                InputArguments = new VariantCollection() {
+                    new Variant(m_id),
+                    new Variant( monitoredItemId ) }
+            });
+
+            var response = await m_session.CallAsync(
+                null,
+                methodsToCall,
+                ct).ConfigureAwait(false);
+        }
+
         #endregion
     }
 }