File Write Problem (Error: 5002)

[Simson Fernando]

Hello Folks,

I'm very new to MQL programming.

I just start coding to write LAST TRADED PRICE in external text file. All my effort are failed.

Below is my code. Can anyone please correct my code.

//+------------------------------------------------------------------+
//|                                                       ZimLTP.mq4 |
//|                                                           ZimTek |
//|                                             [e-mail] |
//+------------------------------------------------------------------+
#property copyright "ZimTek"
#property link      "[e-mail]"
#property version   "1.00"
#property strict
#property indicator_chart_window

input bool Record       = False;
input int  Precision    = 2;

int      _Decimals      =  Precision;
long     _ChartID       =  ChartID();
string   _ObjName       =  "";
string   _DirectoryPath =  TerminalInfoString(TERMINAL_DATA_PATH);
string   _DirectorySub  = "\\MQL4\\Experts\\Notes\\"; 
string   _FileName      =  _Symbol+".txt";

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping      
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {                      
   if (Record==True) 
   {
      ResetLastError();
      //Open the file for writing the LTP value (if the file is absent, it will be created automatically)        
      int file_handle=FileOpen(_DirectoryPath+_DirectorySub+_FileName,FILE_TXT|FILE_READ|FILE_WRITE|FILE_SHARE_WRITE|FILE_SHARE_READ);
      if(file_handle!=INVALID_HANDLE)
      {
        // 
        FileWrite(file_handle,Close[0]);
        FileClose(file_handle);
        PrintFormat("Data is written, %s file is closed",_DirectoryPath+_DirectorySub+_FileName);
      }
      else
      {        
        //Print error
        PrintFormat("Failed to open %s file in specified location, Error code = %d",_DirectoryPath+_DirectorySub+_FileName,GetLastError());
      }
    }  
    _ObjName = "LTP";
    ObjectCreate(_ChartID,_ObjName, OBJ_LABEL, 0, 0, 0);
    ObjectSetText(_ObjName,"LTP: "+DoubleToStr(Close[0],_Decimals),20, "Calibri", Yellow);
    ObjectSet(_ObjName, OBJPROP_CORNER, 0);
    ObjectSet(_ObjName, OBJPROP_XDISTANCE, 050);
    ObjectSet(_ObjName, OBJPROP_YDISTANCE, 620);
        
   return(rates_total);
  }
//+------------------------------------------------------------------+

Thanks in advance.

[Soewono Effendi]

MQL file operations are restrictive to specific folders only.

RTFM

[William Roeder]

string   _DirectoryPath =  TerminalInfoString(TERMINAL_DATA_PATH);
string   _DirectorySub  = "\\MQL4\\Experts\\Notes\\"; 
⋮
FileOpen(_DirectoryPath+_DirectorySub+_FileName, …

You are trying to write to C:\Users\«username»\AppData\Roaming\MetaQuotes\Terminal\«hexString»\MQL4\Files\C:\Users\«username»\AppData\Roaming\MetaQuotes\Terminal\«hexString»\MQL4\Experts\Notes\«fileName» which is an invalid path (colon.)

Perhaps you should read the manual.
and FolderDelete using TERMINAL_DATA_PATH - General - MQL5 programming forum 2017.12.13

[WindmillMQL]

You are trying to write a file to a directory which is not allowed. Only certain directories predefined by MQL4/5 are allowed.

Read this page of the manual:  https://www.mql5.com/en/docs/files

[SOFTCHICKEN967]

WindmillMQL #:

You are trying to write a file to a directory which is not allowed. Only certain directories predefined by MQL4/5 are allowed.

Read this page of the manual:  https://www.mql5.com/en/docs/files

But the path is:"C:\\Users\\........\\MQL5\\Files\\signal.csv",isn't this path?