Cannot create a file in iOS (cocoa error 514.) - ios

Question

In my app I've to create a csv file, so I create this method:
+ (void)saveFileFromArray:(NSMutableArray *)promoArray {
NSMutableString *target = [#"Nome,Cognome,E-mail,Data di nascita,Indirizzo,Città,Cap,Telefono\n" mutableCopy];
for (NSDictionary *dict in promoArray) {
[target appendFormat:#"%#,%#,%#,%#,%#,%#,%#,%#\n",dict[#"name"],dict[#"surname"],dict[#"email"],dict[#"birthdate"],dict[#"address"],dict[#"city"],dict[#"zip"],dict[#"phone"]];
}
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileName = [documentsDirectory stringByAppendingPathComponent:#"profiles.csv"];
NSURL *url = [NSURL URLWithString:fileName];
BOOL success = [target writeToURL:url atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (!success) {
NSLog(#"Errore: %#", error.localizedDescription);
}
}
But when I run the app, for now it saves the .plist file but it doesn't save the .csv file. When I look at the console it tells me: Error: The operation couldn’t be completed. (Cocoa error 514.). So I searched in the web what means error 514, I found this, in which I searched for the error and I found NSFileWriteInvalidFileNameError = 514, how I can solve this error? In my method what's the problem.
I hope you can help me to solve this issue
SOLVED BY MYSELF:
+ (void)saveFileFromArray:(NSMutableArray *)promoArray {
NSMutableString *target = [#"Nome,Cognome,E-mail,Data di nascita,Indirizzo,Città,Cap,Telefono\n" mutableCopy];
for (NSDictionary *dict in promoArray) {
[target appendFormat:#"%#,%#,%#,%#,%#,%#,%#,%#\n",dict[#"name"],dict[#"surname"],dict[#"email"],dict[#"birthdate"],dict[#"address"],dict[#"city"],dict[#"zip"],dict[#"phone"]];
}
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileName = [documentsDirectory stringByAppendingPathComponent:#"profiles.csv"];
BOOL success = [target writeToFile:fileName atomically:YES encoding:NSUTF8StringEncoding error:&error];
if (!success) {
NSLog(#"Errore: %#", error.localizedDescription);
}
}

Answer 1

Change this line
BOOL success = [target writeToURL:url atomically:YES encoding:NSUTF8StringEncoding error:&error];
to
BOOL success = [target writeToFile:fileName atomically:YES encoding:NSUTF8StringEncoding error:&error];