I am using signalR Method - Clients.Caller.receiver(re)

I am using signalR for private message chat application and in that, I am calling

 

Clients.Caller.receiver(re)

response pass successfully but suddenly in catch, I get an error for "Using a Hub instance not created by the HubPipeline is unsupported". Now I can't understand that where reference is missing. Please help me solve this one.

I am using below code

public async Task GetAllMessages(int roomid, int fromuserId, int touserId, int index, int pageSize, int broadcastid = 0)  
            {  
                ResponseModel re = new ResponseModel();  
                try  
                {  
                    var model = new MessageDetailModel  
                    {  
                        Index = index,  
                        PageSize = pageSize,  
                        FromUserId = fromuserId,  
                        ToUserId = touserId,  
                        ChatRoomId = roomid,  
                        BroadCastId = broadcastid  
                    };  
                    MesaageModel totalmessages = new MesaageModel();  
                    List messages = new List();  
                    var usermessages = await _userService.GetAllMessages(model);  
                    messages.AddRange(usermessages);  
                    foreach (var message in messages)  
                    {  
                        model.BroadCastMessageId = model.BroadCastId == 0 ? 0 : message.BroadCastMessageId;  
                        model.ChatRoomMessageId = model.BroadCastId == 0 ? message.ChatRoomMessageId : 0;  
                        List userofseenby = new List();  
                        var users = await _userService.GetMessageSeenBy(model);  
                        userofseenby.AddRange(users);  
                        message.SeenBy = userofseenby;  
                    }  
  
                    totalmessages.Messages = messages;  
  
                    totalmessages.UnseenMessageCount = await _userService.GetUnSeenCount(messages.FirstOrDefault().ChatRoomId, fromuserId);  
                    if (messages.FirstOrDefault().IsBroadCast == true)  
                        totalmessages.Users = (List)await _userService.GetUsersByBroadCastId(messages.FirstOrDefault().BroadCastId);  
                    else if (messages.FirstOrDefault().IsGroup == true)  
                        totalmessages.Users = (List)await _userService.GetUsersByChatRoomId((int)messages.FirstOrDefault().ChatRoomId);  
                    re.MsgCode = 0; re.MsgText = "Success"; re.MsgType = MessageType.Success;  
                    re.ActionCommand = "onAllMessagesReceived";  
                    re.SingleObject = totalmessages;  
                    Clients.Caller.receiver(re);  
                }  
                catch (Exception ex)  
                {  
                    re.ActionCommand = "onAllMessagesReceived";  
                    re = ResponseHelper.ErrorResponse(re.ActionCommand, ex.ToString());  
                    Clients.Caller.receiver(re);  
                }  
            }