Error Code 5004 - page 4

[William Roeder]

samoye:   Is there a solution to error 5004 please? I am getting the same error message trying to write to a file.	Asked and answered. Open the file once before the loop. Close the file after the loop.

[architec]

hey

it seems error 5004 is related to not closing file!

---

int readFileImg (string file_name) {

   int filehandle = FileOpen(file_name, FILE_READ|FILE_BIN);

   if (filehandle!=INVALID_HANDLE) {

      FileClose(filehandle);  // this line is important, without this line you will get 5004

      Alert("done");

   } else Alert("Operation FileOpen failed, error ",GetLastError(), TerminalInfoString(TERMINAL_DATA_PATH));

   return filehandle;

}

[Eleni Anna Branou]

Please use the </> button to insert your code.

[Chris Pedersen]

I have the same 5004 error popping up while testing the EA using Strategy Tester. It must be a bug in mt4 since it can open other files in in the same session but suddenly it cannot open files.

I use this for backtesting a machine learning algorithm.

Now I need another platform for backtesting the algorithm since mt4 doesn't work.

Any ideas on other backtesting platforms?

Preferably python based.

[kypa]

Try MT5.

[pelife]

kypa:
Try MT5.

I am trying to debug my program and I am having the same issue.

Based on the example in the FileOpen Docs, I created this function to read a symbol list from a file.

I included the file in the editor's "Files Directory" and I call the funcion like that:

GetSymbolsFromFile("carteiras","ibrx_100_2018_12_10.txt");

//+------------------------------------------------------------------+
//| Get the symbols                                                  |
//+------------------------------------------------------------------+
void TProgram::GetSymbolsFromFile(const string filePath, const string fileName)
{
   //--- additional variables 
   int    str_size; 
   string str;
   int    array_size;
   string terminal_data_path;
   
   //--- open the file 
   ResetLastError(); 
   //--- Release the symbol array
   ::ArrayFree(m_file_symbols);
   
   terminal_data_path=TerminalInfoString(TERMINAL_DATA_PATH);
   PrintFormat("File path: %s\\Files\\",terminal_data_path);
   
   bool  test1 = FileIsExist(fileName,0 );
   bool  test2 = FileIsExist(fileName,FILE_COMMON);
   
   int file_handle=FileOpen(fileName,FILE_READ|FILE_TXT|FILE_ANSI); 
   if(file_handle!=INVALID_HANDLE) 
   { 
      PrintFormat("%s file is available for reading",filePath); 
      //PrintFormat("File path: %s\\Files\\",terminal_data_path);
      //--- read data from the file 
      while(!FileIsEnding(file_handle)) 
        { 
         //--- find out how many symbols are used for writing the time 
         str_size=FileReadInteger(file_handle,INT_VALUE); 
         //--- read the string 
         str=FileReadString(file_handle,str_size); 
         
         array_size=::ArraySize(m_file_symbols);
         ::ArrayResize(m_file_symbols,array_size+1);
         m_file_symbols[array_size]=str;
         
         //--- print the string 
         PrintFormat(str); 
        } 
      //--- close the file 
      FileClose(file_handle); 
      PrintFormat("Data is read, %s file is closed",fileName); 
   }
   else
   {
      PrintFormat("Failed to open %s file, Error code = %d",fileName,GetLastError()); 
   }
}

I tried many different parameters and filePaths

1 - Tried to use the therminal file path and none of this works.

 int file_handle=FileOpen(fileName,FILE_READ|FILE_TXT|FILE_ANSI); 

I got the errors: 5002 e 5004

ERR_WRONG_FILENAME	5002	Invalid file name
ERR_CANNOT_OPEN_FILE	5004	File opening error