Creating textfile with MQL4 - mql4

Question

I am trying to create a textfile with MQL4. No sucess. It just doesn't work. A very simple script:
void OnStart() {
string terminal_data_path=TerminalInfoString(TERMINAL_DATA_PATH);
string filename=terminal_data_path+"\\MQL4\\Files\\"+"teste2.txt";
int filehandle = FileOpen(filename,FILE_WRITE|FILE_TXT);
FileWriteString(filehandle,"teste");
FileClose(filehandle);
}
This fires error 5002. OK, the file does not exist. I thinked that the script will create the file.
So, I decided to create an empity "teste2.txt" with notepad in the folder. The same error.
Can someone help me?
Thanks

Answer 1

The file is written by default in .../MQL4/Files, so just writting that code works (it creates a file named teste2.txt with teste written in it in .../MQL4/Files) :
void OnStart()
{
int filehandle = FileOpen("teste2.txt",FILE_WRITE|FILE_TXT);
FileWriteString(filehandle,"teste");
FileClose(filehandle);
}
Of course you will need to check the return of the FileX functions (FileOpen, fileWrite, FileClose, etc)

Answer 2

if you call your file string filename="A"+"\\B\\"+"teste2.txt"; it will be written into TerminalInfoString(TERMINAL_DATA_PATH)\MQL4\Files\A\B\ folders. Of course you cannot use prohibited symbols in the file name, and ":\" from the full path (C:\Users\User_NAME\AppData...) is prohibited

Answer 3

First, you need to check to see if there's a file.
//+------------------------------------------------------------------+
//| FileIsExist.mq4 |
//| Copyright 2019, MetaQuotes Software Corp. |
//| https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2019, MetaQuotes Software Corp."
#property link "https://www.mql5.com"
#property version "1.00"
#property strict
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
string terminal_data_path=TerminalInfoString(TERMINAL_DATA_PATH);
string filename = "teste2.txt";
int fileHandle ;
if(FileIsExist(filename,0))
{
Print("Specified File Has");
fileHandle = FileOpen(filename , FILE_WRITE|FILE_TXT);
FileWriteString(fileHandle,"teste");
FileClose(fileHandle);
Print("Write to Existing File Completed");
}else
{
Print("File Not Available, Regenerating....." );
fileHandle = FileOpen(filename , FILE_READ|FILE_WRITE|FILE_TXT);
FileWriteString(fileHandle,"Writing to Newly Created File Completed - teste \n");
FileClose(fileHandle);
Print("Writing to Newly Created File Completed");
}
}
//+------------------------------------------------------------------+