diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mVersionedModelProvider.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mVersionedModelProvider.java
index 9448d9c0a4..0667c46da8 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mVersionedModelProvider.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/LwM2mVersionedModelProvider.java
@@ -95,7 +95,7 @@ public class LwM2mVersionedModelProvider implements LwM2mModelProvider {
                 if (objectModel != null)
                     return objectModel.resources.get(resourceId);
                 else
-                    log.trace("TbResources (Object model) with id [{}/0/{}] not found on the server", objectId, resourceId);
+                    log.trace("Tenant hasn't such the TbResources: Object model with id [{}/0/{}].", objectId, resourceId);
                 return null;
             } catch (Exception e) {
                 log.error("", e);
@@ -128,14 +128,17 @@ public class LwM2mVersionedModelProvider implements LwM2mModelProvider {
         private ObjectModel getObjectModelDynamic(Integer objectId, String version) {
             String key = getKeyIdVer(objectId, version);
             ObjectModel objectModel = models.get(tenantId).get(key);
-
             if (objectModel == null) {
                 modelsLock.lock();
                 try {
                     objectModel = models.get(tenantId).get(key);
                     if (objectModel == null) {
                         objectModel = getObjectModel(key);
+                    }
+                    if (objectModel != null) {
                         models.get(tenantId).put(key, objectModel);
+                    } else {
+                        log.error("Tenant hasn't such the resource: Object model with id [{}] version [{}].", objectId, version);
                     }
                 } finally {
                     modelsLock.unlock();
diff --git a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/downlink/DefaultLwM2mDownlinkMsgHandler.java b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/downlink/DefaultLwM2mDownlinkMsgHandler.java
index 64d42f001e..681ae6e8f0 100644
--- a/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/downlink/DefaultLwM2mDownlinkMsgHandler.java
+++ b/common/transport/lwm2m/src/main/java/org/thingsboard/server/transport/lwm2m/server/downlink/DefaultLwM2mDownlinkMsgHandler.java
@@ -186,6 +186,9 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
             }
             sendSimpleRequest(client, downlink, request.getTimeout(), callback);
         }
+        else {
+            callback.onValidationError(toString(request), "Tenant hasn't such the TbResources: " + request.getVersionedId() + "!");
+        }
     }
 
     @Override
@@ -245,7 +248,7 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
                 callback.onError(toString(request), e);
             }
         } else {
-            callback.onValidationError(toString(request), "Resource " + request.getVersionedId() + " is not configured in the device profile!");
+            callback.onValidationError(toString(request), "Tenant hasn't such the TbResources: " + request.getVersionedId() + "!");
         }
     }
 
@@ -271,10 +274,15 @@ public class DefaultLwM2mDownlinkMsgHandler extends LwM2MExecutorAwareService im
              **/
             Collection<LwM2mResource> resources = client.getNewResourceForInstance(request.getVersionedId(), request.getValue(), modelProvider, this.converter);
             ResourceModel resourceModelWrite = client.getResourceModel(request.getVersionedId(), modelProvider);
-            ContentFormat contentFormat = request.getObjectContentFormat() != null ? request.getObjectContentFormat() : convertResourceModelTypeToContentFormat(client, resourceModelWrite.type);
-            WriteRequest downlink = new WriteRequest(WriteRequest.Mode.UPDATE, contentFormat, resultIds.getObjectId(),
-                    resultIds.getObjectInstanceId(), resources);
-            sendSimpleRequest(client, downlink, request.getTimeout(), callback);
+            if (resourceModelWrite != null) {
+                ContentFormat contentFormat = request.getObjectContentFormat() != null ? request.getObjectContentFormat() : convertResourceModelTypeToContentFormat(client, resourceModelWrite.type);
+                WriteRequest downlink = new WriteRequest(WriteRequest.Mode.UPDATE, contentFormat, resultIds.getObjectId(),
+                        resultIds.getObjectInstanceId(), resources);
+                sendSimpleRequest(client, downlink, request.getTimeout(), callback);
+            }
+            else {
+                callback.onValidationError(toString(request), "Tenant hasn't such the TbResources: " + request.getVersionedId() + " !");
+            }
         } else if (resultIds.isObjectInstance()) {
             /*
              *  params = "{\"id\":0,\"resources\":[{\"id\":14,\"value\":\"+5\"},{\"id\":15,\"value\":\"+9\"}]}"