diff --git a/osm_ro/vim_thread.py b/osm_ro/vim_thread.py
index cbcd31f..fc78d5f 100644
--- a/osm_ro/vim_thread.py
+++ b/osm_ro/vim_thread.py
@@ -223,11 +223,17 @@
                 nb_processed += 1
             self.refresh_tasks.pop(0)
             if task["item"] == 'instance_vms':
-                vm_to_refresh_list.append(task["vim_id"])
-                vm_to_refresh_dict[task["vim_id"]] = task
+                if task["vim_id"] not in vm_to_refresh_dict:
+                    vm_to_refresh_dict[task["vim_id"]] = [task]
+                    vm_to_refresh_list.append(task["vim_id"])
+                else:
+                    vm_to_refresh_dict[task["vim_id"]].append(task)
             elif task["item"] == 'instance_nets':
-                net_to_refresh_list.append(task["vim_id"])
-                net_to_refresh_dict[task["vim_id"]] = task
+                if task["vim_id"] not in net_to_refresh_dict:
+                    net_to_refresh_dict[task["vim_id"]] = [task]
+                    net_to_refresh_list.append(task["vim_id"])
+                else:
+                    net_to_refresh_dict[task["vim_id"]].append(task)
             else:
                 task_id = task["instance_action_id"] + "." + str(task["task_index"])
                 self.logger.critical("task={}: unknown task {}".format(task_id, task["item"]), exc_info=True)
@@ -247,111 +253,112 @@
                     vim_dict[vim_id] = {"status": "VIM_ERROR", "error_msg": str(e)}
 
             for vim_id, vim_info in vim_dict.items():
+
                 # look for task
-                task_need_update = False
-                task = vm_to_refresh_dict[vim_id]
-                task_id = task["instance_action_id"] + "." + str(task["task_index"])
-                self.logger.debug("task={} get-VM: vim_vm_id={} result={}".format(task_id, task["vim_id"], vim_info))
+                for task in vm_to_refresh_dict[vim_id]:
+                    task_need_update = False
+                    task_id = task["instance_action_id"] + "." + str(task["task_index"])
+                    self.logger.debug("task={} get-VM: vim_vm_id={} result={}".format(task_id, task["vim_id"], vim_info))
 
-                # check and update interfaces
-                task_warning_msg = ""
-                for interface in vim_info.get("interfaces", ()):
-                    vim_interface_id = interface["vim_interface_id"]
-                    if vim_interface_id not in task["extra"]["interfaces"]:
-                        self.logger.critical("task={} get-VM: Interface not found {} on task info {}".format(
-                            task_id, vim_interface_id, task["extra"]["interfaces"]), exc_info=True)
-                        continue
-                    task_interface = task["extra"]["interfaces"][vim_interface_id]
-                    task_vim_interface = task["vim_interfaces"].get(vim_interface_id)
-                    if task_vim_interface != interface:
-                        # delete old port
-                        if task_interface.get("sdn_port_id"):
-                            try:
-                                with self.db_lock:
-                                    self.ovim.delete_port(task_interface["sdn_port_id"])
-                                    task_interface["sdn_port_id"] = None
-                                    task_need_update = True
-                            except ovimException as e:
-                                error_text = "ovimException deleting external_port={}: {}".format(
-                                    task_interface["sdn_port_id"], e)
-                                self.logger.error("task={} get-VM: {}".format(task_id, error_text), exc_info=True)
-                                task_warning_msg += error_text
-                                # TODO Set error_msg at instance_nets instead of instance VMs
+                    # check and update interfaces
+                    task_warning_msg = ""
+                    for interface in vim_info.get("interfaces", ()):
+                        vim_interface_id = interface["vim_interface_id"]
+                        if vim_interface_id not in task["extra"]["interfaces"]:
+                            self.logger.critical("task={} get-VM: Interface not found {} on task info {}".format(
+                                task_id, vim_interface_id, task["extra"]["interfaces"]), exc_info=True)
+                            continue
+                        task_interface = task["extra"]["interfaces"][vim_interface_id]
+                        task_vim_interface = task["vim_interfaces"].get(vim_interface_id)
+                        if task_vim_interface != interface:
+                            # delete old port
+                            if task_interface.get("sdn_port_id"):
+                                try:
+                                    with self.db_lock:
+                                        self.ovim.delete_port(task_interface["sdn_port_id"])
+                                        task_interface["sdn_port_id"] = None
+                                        task_need_update = True
+                                except ovimException as e:
+                                    error_text = "ovimException deleting external_port={}: {}".format(
+                                        task_interface["sdn_port_id"], e)
+                                    self.logger.error("task={} get-VM: {}".format(task_id, error_text), exc_info=True)
+                                    task_warning_msg += error_text
+                                    # TODO Set error_msg at instance_nets instead of instance VMs
 
-                        # Create SDN port
-                        sdn_net_id = task_interface.get("sdn_net_id")
-                        if sdn_net_id and interface.get("compute_node") and interface.get("pci"):
-                            sdn_port_name = sdn_net_id + "." + task["vim_id"]
-                            sdn_port_name = sdn_port_name[:63]
-                            try:
-                                with self.db_lock:
-                                    sdn_port_id = self.ovim.new_external_port(
-                                        {"compute_node": interface["compute_node"],
-                                         "pci": interface["pci"],
-                                         "vlan": interface.get("vlan"),
-                                         "net_id": sdn_net_id,
-                                         "region": self.vim["config"]["datacenter_id"],
-                                         "name": sdn_port_name,
-                                         "mac": interface.get("mac_address")})
-                                    task_interface["sdn_port_id"] = sdn_port_id
-                                    task_need_update = True
-                            except (ovimException, Exception) as e:
-                                error_text = "ovimException creating new_external_port compute_node={}"\
-                                             " pci={} vlan={} {}".format(
-                                                interface["compute_node"],
-                                                interface["pci"],
-                                                interface.get("vlan"), e)
-                                self.logger.error("task={} get-VM: {}".format(task_id, error_text), exc_info=True)
-                                task_warning_msg += error_text
-                                # TODO Set error_msg at instance_nets instead of instance VMs
+                            # Create SDN port
+                            sdn_net_id = task_interface.get("sdn_net_id")
+                            if sdn_net_id and interface.get("compute_node") and interface.get("pci"):
+                                sdn_port_name = sdn_net_id + "." + task["vim_id"]
+                                sdn_port_name = sdn_port_name[:63]
+                                try:
+                                    with self.db_lock:
+                                        sdn_port_id = self.ovim.new_external_port(
+                                            {"compute_node": interface["compute_node"],
+                                             "pci": interface["pci"],
+                                             "vlan": interface.get("vlan"),
+                                             "net_id": sdn_net_id,
+                                             "region": self.vim["config"]["datacenter_id"],
+                                             "name": sdn_port_name,
+                                             "mac": interface.get("mac_address")})
+                                        task_interface["sdn_port_id"] = sdn_port_id
+                                        task_need_update = True
+                                except (ovimException, Exception) as e:
+                                    error_text = "ovimException creating new_external_port compute_node={}"\
+                                                 " pci={} vlan={} {}".format(
+                                                    interface["compute_node"],
+                                                    interface["pci"],
+                                                    interface.get("vlan"), e)
+                                    self.logger.error("task={} get-VM: {}".format(task_id, error_text), exc_info=True)
+                                    task_warning_msg += error_text
+                                    # TODO Set error_msg at instance_nets instead of instance VMs
 
+                            with self.db_lock:
+                                self.db.update_rows(
+                                    'instance_interfaces',
+                                    UPDATE={"mac_address": interface.get("mac_address"),
+                                            "ip_address": interface.get("ip_address"),
+                                            "vim_info": interface.get("vim_info"),
+                                            "sdn_port_id": task_interface.get("sdn_port_id"),
+                                            "compute_node": interface.get("compute_node"),
+                                            "pci": interface.get("pci"),
+                                            "vlan": interface.get("vlan")},
+                                    WHERE={'uuid': task_interface["iface_id"]})
+                            task["vim_interfaces"][vim_interface_id] = interface
+
+                    # check and update task and instance_vms database
+                    vim_info_error_msg = None
+                    if vim_info.get("error_msg"):
+                        vim_info_error_msg = self._format_vim_error_msg(vim_info["error_msg"] + task_warning_msg)
+                    elif task_warning_msg:
+                        vim_info_error_msg = self._format_vim_error_msg(task_warning_msg)
+                    task_vim_info = task.get("vim_info")
+                    task_error_msg = task.get("error_msg")
+                    task_vim_status = task["extra"].get("vim_status")
+                    if task_vim_status != vim_info["status"] or task_error_msg != vim_info_error_msg or \
+                            (vim_info.get("vim_info") and task_vim_info != vim_info["vim_info"]):
+                        temp_dict = {"status": vim_info["status"], "error_msg": vim_info_error_msg}
+                        if vim_info.get("vim_info"):
+                            temp_dict["vim_info"] = vim_info["vim_info"]
+                        with self.db_lock:
+                            self.db.update_rows('instance_vms', UPDATE=temp_dict, WHERE={"uuid": task["item_id"]})
+                        task["extra"]["vim_status"] = vim_info["status"]
+                        task["error_msg"] = vim_info_error_msg
+                        if vim_info.get("vim_info"):
+                            task["vim_info"] = vim_info["vim_info"]
+                        task_need_update = True
+
+                    if task_need_update:
                         with self.db_lock:
                             self.db.update_rows(
-                                'instance_interfaces',
-                                UPDATE={"mac_address": interface.get("mac_address"),
-                                        "ip_address": interface.get("ip_address"),
-                                        "vim_info": interface.get("vim_info"),
-                                        "sdn_port_id": task_interface.get("sdn_port_id"),
-                                        "compute_node": interface.get("compute_node"),
-                                        "pci": interface.get("pci"),
-                                        "vlan": interface.get("vlan")},
-                                WHERE={'uuid': task_interface["iface_id"]})
-                        task["vim_interfaces"][vim_interface_id] = interface
-
-                # check and update task and instance_vms database
-                if vim_info.get("error_msg"):
-                    vim_info["error_msg"] = self._format_vim_error_msg(vim_info["error_msg"] + task_warning_msg)
-                elif task_warning_msg:
-                    vim_info["error_msg"] = self._format_vim_error_msg(task_warning_msg)
-
-                task_vim_info = task.get("vim_info")
-                task_error_msg = task.get("error_msg")
-                task_vim_status = task["extra"].get("vim_status")
-                if task_vim_status != vim_info["status"] or task_error_msg != vim_info.get("error_msg") or \
-                        (vim_info.get("vim_info") and task_vim_info != vim_info["vim_info"]):
-                    temp_dict = {"status": vim_info["status"], "error_msg": vim_info.get("error_msg")}
-                    if vim_info.get("vim_info"):
-                        temp_dict["vim_info"] = vim_info["vim_info"]
-                    with self.db_lock:
-                        self.db.update_rows('instance_vms', UPDATE=temp_dict, WHERE={"uuid": task["item_id"]})
-                    task["extra"]["vim_status"] = vim_info["status"]
-                    task["error_msg"] = vim_info.get("error_msg")
-                    if vim_info.get("vim_info"):
-                        task["vim_info"] = vim_info["vim_info"]
-                    task_need_update = True
-
-                if task_need_update:
-                    with self.db_lock:
-                        self.db.update_rows(
-                            'vim_actions',
-                            UPDATE={"extra": yaml.safe_dump(task["extra"], default_flow_style=True, width=256),
-                                    "error_msg": task.get("error_msg"), "modified_at": now},
-                            WHERE={'instance_action_id': task['instance_action_id'],
-                                   'task_index': task['task_index']})
-                if task["extra"].get("vim_status") == "BUILD":
-                    self._insert_refresh(task, now + self.REFRESH_BUILD)
-                else:
-                    self._insert_refresh(task, now + self.REFRESH_ACTIVE)
+                                'vim_actions',
+                                UPDATE={"extra": yaml.safe_dump(task["extra"], default_flow_style=True, width=256),
+                                        "error_msg": task.get("error_msg"), "modified_at": now},
+                                WHERE={'instance_action_id': task['instance_action_id'],
+                                       'task_index': task['task_index']})
+                    if task["extra"].get("vim_status") == "BUILD":
+                        self._insert_refresh(task, now + self.REFRESH_BUILD)
+                    else:
+                        self._insert_refresh(task, now + self.REFRESH_ACTIVE)
 
         if net_to_refresh_list:
             now = time.time()
@@ -366,60 +373,62 @@
 
             for vim_id, vim_info in vim_dict.items():
                 # look for task
-                task = net_to_refresh_dict[vim_id]
-                task_id = task["instance_action_id"] + "." + str(task["task_index"])
-                self.logger.debug("task={} get-net: vim_net_id={} result={}".format(task_id, task["vim_id"], vim_info))
+                for task in net_to_refresh_dict[vim_id]:
+                    task_id = task["instance_action_id"] + "." + str(task["task_index"])
+                    self.logger.debug("task={} get-net: vim_net_id={} result={}".format(task_id, task["vim_id"], vim_info))
 
-                task_vim_info = task.get("vim_info")
-                task_vim_status = task["extra"].get("vim_status")
-                task_error_msg = task.get("error_msg")
-                task_sdn_net_id = task["extra"].get("sdn_net_id")
+                    task_vim_info = task.get("vim_info")
+                    task_vim_status = task["extra"].get("vim_status")
+                    task_error_msg = task.get("error_msg")
+                    task_sdn_net_id = task["extra"].get("sdn_net_id")
 
-                # get ovim status
-                if task_sdn_net_id:
-                    try:
+                    vim_info_status = vim_info["status"]
+                    vim_info_error_msg = vim_info.get("error_msg")
+                    # get ovim status
+                    if task_sdn_net_id:
+                        try:
+                            with self.db_lock:
+                                sdn_net = self.ovim.show_network(task_sdn_net_id)
+                        except (ovimException, Exception) as e:
+                            text_error = "ovimException getting network snd_net_id={}: {}".format(task_sdn_net_id, e)
+                            self.logger.error("task={} get-net: {}".format(task_id, text_error), exc_info=True)
+                            sdn_net = {"status": "ERROR", "error_msg": text_error}
+                        if sdn_net["status"] == "ERROR":
+                            if not vim_info_error_msg:
+                                vim_info_error_msg = sdn_net["error_msg"]
+                            else:
+                                vim_info_error_msg = "VIM_ERROR: {} && SDN_ERROR: {}".format(
+                                    self._format_vim_error_msg(vim_info_error_msg, 1024//2-14),
+                                    self._format_vim_error_msg(sdn_net["error_msg"], 1024//2-14))
+                            if vim_info_status == "VIM_ERROR":
+                                vim_info_status = "VIM_SDN_ERROR"
+                            else:
+                                vim_info_status = "SDN_ERROR"
+
+                    # update database
+                    if vim_info_error_msg:
+                        vim_info_error_msg = self._format_vim_error_msg(vim_info_error_msg)
+                    if task_vim_status != vim_info_status or task_error_msg != vim_info_error_msg or \
+                            (vim_info.get("vim_info") and task_vim_info != vim_info["vim_info"]):
+                        task["extra"]["vim_status"] = vim_info_status
+                        task["error_msg"] = vim_info_error_msg
+                        if vim_info.get("vim_info"):
+                            task["vim_info"] = vim_info["vim_info"]
+                        temp_dict = {"status": vim_info_status, "error_msg": vim_info_error_msg}
+                        if vim_info.get("vim_info"):
+                            temp_dict["vim_info"] = vim_info["vim_info"]
                         with self.db_lock:
-                            sdn_net = self.ovim.show_network(task_sdn_net_id)
-                    except (ovimException, Exception) as e:
-                        text_error = "ovimException getting network snd_net_id={}: {}".format(task_sdn_net_id, e)
-                        self.logger.error("task={} get-net: {}".format(task_id, text_error), exc_info=True)
-                        sdn_net = {"status": "ERROR", "error_msg": text_error}
-                    if sdn_net["status"] == "ERROR":
-                        if not vim_info.get("error_msg"):
-                            vim_info["error_msg"] = sdn_net["error_msg"]
-                        else:
-                            vim_info["error_msg"] = "VIM_ERROR: {} && SDN_ERROR: {}".format(
-                                self._format_vim_error_msg(vim_info["error_msg"], 1024//2-14),
-                                self._format_vim_error_msg(sdn_net["error_msg"], 1024//2-14))
-                        if vim_info["status"] == "VIM_ERROR":
-                            vim_info["status"] = "VIM_SDN_ERROR"
-                        else:
-                            vim_info["status"] = "SDN_ERROR"
-
-                # update database
-                if vim_info.get("error_msg"):
-                    vim_info["error_msg"] = self._format_vim_error_msg(vim_info["error_msg"])
-                if task_vim_status != vim_info["status"] or task_error_msg != vim_info.get("error_msg") or \
-                        (vim_info.get("vim_info") and task_vim_info != vim_info["vim_info"]):
-                    task["extra"]["vim_status"] = vim_info["status"]
-                    task["error_msg"] = vim_info.get("error_msg")
-                    if vim_info.get("vim_info"):
-                        task["vim_info"] = vim_info["vim_info"]
-                    temp_dict = {"status": vim_info["status"], "error_msg": vim_info.get("error_msg")}
-                    if vim_info.get("vim_info"):
-                        temp_dict["vim_info"] = vim_info["vim_info"]
-                    with self.db_lock:
-                        self.db.update_rows('instance_nets', UPDATE=temp_dict, WHERE={"uuid": task["item_id"]})
-                        self.db.update_rows(
-                            'vim_actions',
-                            UPDATE={"extra": yaml.safe_dump(task["extra"], default_flow_style=True, width=256),
-                                    "error_msg": task.get("error_msg"), "modified_at": now},
-                            WHERE={'instance_action_id': task['instance_action_id'],
-                                   'task_index': task['task_index']})
-                if task["extra"].get("vim_status") == "BUILD":
-                    self._insert_refresh(task, now + self.REFRESH_BUILD)
-                else:
-                    self._insert_refresh(task, now + self.REFRESH_ACTIVE)
+                            self.db.update_rows('instance_nets', UPDATE=temp_dict, WHERE={"uuid": task["item_id"]})
+                            self.db.update_rows(
+                                'vim_actions',
+                                UPDATE={"extra": yaml.safe_dump(task["extra"], default_flow_style=True, width=256),
+                                        "error_msg": task.get("error_msg"), "modified_at": now},
+                                WHERE={'instance_action_id': task['instance_action_id'],
+                                       'task_index': task['task_index']})
+                    if task["extra"].get("vim_status") == "BUILD":
+                        self._insert_refresh(task, now + self.REFRESH_BUILD)
+                    else:
+                        self._insert_refresh(task, now + self.REFRESH_ACTIVE)
 
         return nb_processed