Why I cannot see the file which should be created in mql5?

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+

void OnTick()
  {
//---
      static double lastHigh;
      static double lastLow;   
      
      MqlRates priceInfo[];
      
      ArraySetAsSeries(priceInfo, true);  
      
      int priceData = CopyRates(_Symbol, _Period, 0, 3, priceInfo);
      
      string common = FILE_COMMON ;
      
      if ((lastHigh != priceInfo[1].high) && (lastLow != priceInfo[1].low)) {
         
         int handle = FileOpen("aaa.csv", FILE_READ|FILE_WRITE|FILE_CSV|FILE_ANSI);
         
        FileSeek(handle, 0, SEEK_END);
        
        FileWrite(handle, "Time", priceInfo[1].time);
        FileClose(handle);
        lastHigh = priceInfo[1].high;
        lastLow = priceInfo[1].low;
        
        Comment(priceInfo[1].high);
      }
  }
//+------------------------------------------------------------------+

 
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- create timer
   EventSetTimer(1);
  
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//--- destroy timer
   EventKillTimer();
  
  }
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
//---
        
  
  }
//+------------------------------------------------------------------+
//| Timer function                                                   |
//+------------------------------------------------------------------+
void OnTimer()
  {
//---
   static double lastHigh;
      static double lastLow;  
      
      MqlRates priceInfo[];
      
      ArraySetAsSeries(priceInfo, true);  
      
      int priceData = CopyRates(_Symbol, _Period, 0, 3, priceInfo);
      
      string common = FILE_COMMON ;
      
      if ((lastHigh != priceInfo[1].high) && (lastLow != priceInfo[1].low)) {
        
         int handle = FileOpen("aaa.csv", FILE_READ|FILE_WRITE|FILE_CSV|FILE_ANSI);
        
        FileSeek(handle, 0, SEEK_END);
        
        FileWrite(handle, "Time", priceInfo[1].time);
        FileClose(handle);
        lastHigh = priceInfo[1].high;
        lastLow = priceInfo[1].low;
        
        Comment(priceInfo[1].high);
      }
  }
//+------------------------------------------------------------------+

Quoting eess

Disliked

//+------------------------------------------------------------------+ //| Expert initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- create timer EventSetTimer(1); //--- return(INIT_SUCCEEDED); } //+------------------------------------------------------------------+ //| Expert deinitialization function | //+------------------------------------------------------------------+ void OnDeinit(const int reason) { //--- destroy timer EventKillTimer(); } //+------------------------------------------------------------------+...

Ignored

 string data[][3]={{"test", "2", "3"},{ "4", "5", "6"}};
   
   helper.writeCsvLines(data, "test.csv");

void writeCsvLines(string& dataToWrite[][], string fileName)
   {
   
   
      int handle = FileOpen( fileName,
                             FILE_CSV|FILE_READ|FILE_WRITE, ','
                             );
     
      FileSeek( handle, 0, SEEK_END );
      
      if ( handle > 0 ) {
      
         int size = ArraySize(dataToWrite);
         int firstDimentionSize = size/3; 
         
         for (int i = 0; i< firstDimentionSize; i++) {        
         
            
            FileWrite( handle, dataToWrite[i][0], dataToWrite[i][1], dataToWrite[i][2]/*, dataToWrite[i][3] , dataToWrite[i][4], dataToWrite[i][5]*/);            
            
         }
         FileClose( handle );
      }
   }

Quoting SPeedFANat1c

Disliked

{quote} but in tester onTick executed, I put other code in it and other code works.

Ignored

Quoting eess

Disliked

{quote} For tester mode, I don't know whether file can be generated, never try before. But the timer code I give, I put on any chart. not in tester, can see the file in \MQL5\Files folder.

Ignored

Quoting SPeedFANat1c

Disliked

{quote} it can be generated in tester, like in that video I attached.

Ignored

Quoting eess

Disliked

{quote} Sorry I don't have time to watch the video, but can you find the file when you run it in tester mode and inside OnTick?

Ignored

Quoting SPeedFANat1c

Disliked

{quote} No, I cannot find. At least in the folder I expect. I will try to add breakpoint after it should be created and search all computer

Ignored

Quoting eess

Disliked

{quote} What is the actual usage of this EA? Are you trying to get the history data by trying to run this EA in tester?

Ignored

Quoting SPeedFANat1c

Disliked

{quote} this ea is just for learning to write to file. I want to use file writing for various things.

Ignored

Quoting eess

Disliked

{quote} Oh I see, friend, tmr when market open, you run your OnTick code on actual chart, not in tester, during peak hour of forex when prices change rapidly, you just check whether there's any issues with the file I/O Operations. My worry is that when prices changes rapidly in live markets, the OnTick function is executed every often and very fast, your I/O operations may have issues. I must stress that I don't mean you cannot do anything in OnTick, it's only because you are doing File I/O, that's why I have this concern.

Ignored

Quoting SPeedFANat1c

Disliked

{quote} I do not plan to write on every tick, I believe it would slow down my program. I just made it to be exactly as in example in the video, to just learn and to make it work first at all. Damn became so angry when could not do such simple thing fast. I have even tried that in the past and stopped doing , I had commented code with todo. And just today devided it would be good to have it. Probably earlier I became also angry and stopped doing it because was not clear.

Ignored

Quoting eess

Disliked

{quote} Steady and slowly, Friend.. It may seems simple, but not really that simple....

Ignored

Quote

Disliked

The folder I am using is: C:\Users\JVD\AppData\Roaming\MetaQuotes\Tester\D0E8209F77C8CF37AD8BF550E51FF075\Agent-127.0.0.1-3000