Save and Load data

[UnknownInnocent]

Hello, In my Expert I have this list:

CArrayList<ClickDatapoint *> *clickData;

ClickDatapoint has these for us relevant funtions:

ClickDatapoint::ClickDatapoint(const MqlRates &price_data, const CLICK_TYPE &click_type) {
   priceData = price_data;
   ArrayResize(clickType, 1);
   clickType[0] = click_type;      
}

void ClickDatapoint::addClickType(CLICK_TYPE click_type) {
   if(!hasClickType(click_type)) {
      int size = ArraySize(clickType);
      ArrayResize(clickType, size + 1);
      clickType[size] = click_type;
   }
}

const string ClickDatapoint::toString(const string sep) const {
   string res = TimeToString(priceData.time, TIME_DATE | TIME_MINUTES | TIME_SECONDS);
   for(unsigned int i = 0; i < (unsigned int) ArraySize(clickType); ++i) {
      res += sep + EnumToString(clickType[i]);
   }
   return res;
}

Now I save the CArrayList like this:

bool save() {
   string file = filepath + Symbol() + (string)Period() + ".csv";
   int file_handle = FileOpen(file, FILE_WRITE | FILE_CSV);
   
   if(file_handle != INVALID_HANDLE) {
      for(unsigned int i = 0; i < (unsigned int) clickData.Count(); ++i) {
         ClickDatapoint *temp;
         clickData.TryGetValue(i, temp);
         FileWrite(file_handle, temp.toString(CharToString(separator)));
      }
      
      FileClose(file_handle);
      return true;
   } else {
      return false;
   }
}

The result is something like that:

2021.09.24 03:00:00,OPEN_LONG
2021.09.27 09:00:00,OPEN_LONG
2021.09.27 12:00:00,OPEN_LONG
2021.09.24 17:00:00,OPEN_SHORT,CLOSE_SHORT
2021.09.27 06:00:00,OPEN_SHORT

So far everything works. But now I want to load the data from a csv-file to my CArrayList. For that I have following functions:

bool load() {
   string file = filepath + Symbol() + (string)Period() + ".csv";
   int file_handle = FileOpen(file, FILE_READ | FILE_CSV);
   
   if(file_handle != INVALID_HANDLE) {
      while(!FileIsEnding(file_handle)) {
         string line = FileReadString(file_handle);
         clickData.Add(parseString(line));
      }
      
      FileClose(file_handle);
      return true;
   } else {
      return false;
   }
}

ClickDatapoint *parseString(const string &str) {
   string arr[];
   int size = StringSplit(str, (ushort)separator, arr);
   
   datetime time = StringToTime(arr[0]);
   CLICK_TYPE click_type = (CLICK_TYPE) arr[1];
   MqlRates rate = getRate(Period(), time);
   ClickDatapoint *res = new ClickDatapoint(rate, click_type);
   for(unsigned int i = 2; i < (unsigned int) size; ++i) {
      CLICK_TYPE c = (CLICK_TYPE) arr[i];
      res.addClickType(c);
   }
   return res;
}

MqlRates getRate(const ENUM_TIMEFRAMES timeframe, const datetime &time) {
   MqlRates rates[];
   int index = iBarShift(Symbol(), timeframe, time, true);
   CopyRates(Symbol(), timeframe, (index >= 0 ? index - 1 : 0), 1, rates);
   if(index < 0) {
      SetUserError(4001);
   }
   return rates[0];
}

It seems like the error is in parseString somewhere here:

MqlRates rate = getRate(Period(), time);
ClickDatapoint *res = new ClickDatapoint(rate, click_type);

but I can't find it.