Read the data buffer of esp32 cam as binary

Why I can not read from txt file in SD ?in every time print "Opening file to read failed" !!

void setup() {

Serial.begin(115200);
int sis=256 * 10;
float Main_Array=(float)malloc(sis * sizeof(float));
File myFile = SD.open("/jj.txt",FILE_READ);

if (myFile) {
Serial.println("Opening file to read failed");
return;
}
else{
Serial.println("File Content:");
while (myFile.available()){
for (int i=0; i<=10; i++){
Main_Array[i] = myFile.parseInt();
Serial.println(Main_Array[i]);}

myFile.close();
}
}
}
void loop()
{
}