Network Functions 4014 error

[Thembekile Mkhombo]

I'm new to working with network function, I'm trying to create a simple client server connection between a python app and MQL5  following this tutorial https://www.mql5.com/en/articles/5691. I read the docs of networks functions again and i saw that you get this error if you call the network function from anything other than a script or EA. But this does not make since because i'm using an ea, here is a sample, code fails at: with 4014 error

int socket=SocketCreate(SOCKET_DEFAULT);

//+------------------------------------------------------------------+
//|                                                 SocketClient.mq5 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2020, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
   
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//---
   
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
     int socket=SocketCreate(SOCKET_DEFAULT);
     if(socket!=INVALID_HANDLE) 
     {
       if(SocketConnect(socket,"localhost",65535,1000))
       {
          Print("Connected to "," localhost",":",65535);
        
          MqlRates PriceInfo[];
          ArraySetAsSeries(PriceInfo, true);
          int Data = CopyRates(Symbol(), Period(), 0, 3, PriceInfo);
               
          string tosend;
          for(int i=0;i<ArraySize(PriceInfo);i++)
          {tosend+=(string)PriceInfo[i].close+" ";}
                
          string received = socksend(socket, tosend) ? socketreceive(socket, 10) : ""; 
       }
       else
       {  
          Print("Connection ","localhost",":",65535," error ",GetLastError());
          SocketClose(socket); 
       }
     }
     else
     {
       Print("Socket creation error ",GetLastError()); 
     }
   
 }
//+------------------------------------------------------------------+

// Send to server
bool socksend(int sock,string request) 
  {
   char req[];
   // Byte array conversion
   int  len=StringToCharArray(request,req)-1;
   if(len<0) return(false);
   return(SocketSend(sock,req,len)==len); 
  }
  
// Recieve fro client
string socketreceive(int sock,int timeout)
  {
   char rsp[];
   string result="";
   uint len;
   uint timeout_check=GetTickCount()+timeout;
   do
     {
      len=SocketIsReadable(sock);
      if(len)
        {
         int rsp_len;
         rsp_len=SocketRead(sock,rsp,len,timeout);
         if(rsp_len>0) 
           {
            result+=CharArrayToString(rsp,0,rsp_len); 
           }
        }
     }
   while((GetTickCount()<timeout_check) && !IsStopped());
   return result;
  }

[Carl Schreiber]

As 4014 means: "Function is not allowed for call" what is the OS: Linux, OS?

[Thembekile Thembekile]

I am using windows 10, I have 2 laptops and i tried on both and got the same error 

[Sardion Maranatha]

Thembekile Thembekile:
I am using windows 10, I have 2 laptops and i tried on both and got the same error 

did you run the socket function in strategy tester? i think it's not possible from strategy tester

[Pouria_mzn]

According to SocketConnect() documentation, 

Connection address should be added to the list of allowed ones on the client terminal side (Tools \ Options \ Expert Advisors).

So, in MetaTrader Tools\Options\Expert Advisors, add 127.0.0.1 to the Allow WebRequest for listed URL.

[bichson2002]

The function can be called only from Expert Advisors and scripts, as they run in their own execution threads. If calling from an indicator, GetLastError() returns the error 4014 – "Function is not allowed for call".

You need only add socket server address into "Allow WebRequest for listed URL" (Tool-> Option -> Expert Advisors)

[mytradingbook org]

changes the "localhost" to 127.0.0.1 ( or your IP SERVER, pls don't use localhost as address)

[Dominik Egert]

Why not use "localhost"?

Please elaborate your statement.