I need to zip my log file and email it. I'm using Objective-zip for zipping my file. And this is my code-(void)mailLogFile { if ([MFMailComposeViewController canSendMail]) { NSDictionary *user = [[DBHelper getSharedInstance] getCurrentUser]; NSString *propertyQuery = [NSString stringWithFormat:@"SELECT RecentActivityId,PropertyPIC,PropertyId,Message,IsSynced,ActivityTime,ErrorCode,ErrorMessage,ErrorData,EntityId,TableNames From RecentActivity ORDER BY ActivityTime desc"]; NSArray *resultArry = [[DBHelper getSharedInstance] getRecordsBySQL:propertyQuery]; NSLog(@"This is the eNVDS in Recent Activity:%@" ,resultArry); [[DBHelper getSharedInstance] AddLogFile:[NSString stringWithFormat:@"This is the eNVDS in Recent Activity:%@" ,resultArry]]; NSPredicate *notsynced = [NSPredicate predicateWithFormat:@"IsSynced == 0 || IsSynced == %@",@"0"]; NSArray *notsyncedenvds = [resultArry filteredArrayUsingPredicate:notsynced]; NSLog(@"This is the eNVDS in Recent Activity which is not synced:%@" ,notsyncedenvds); [[DBHelper getSharedInstance] AddLogFile:[NSString stringWithFormat:@"This is the eNVDS in Recent Activity which is not synced:%@" ,notsyncedenvds]]; NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *WritableDBPath= [documentsDirectory stringByAppendingPathComponent:@"Logfile.txt"]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"test.zip"]; NSData *zipdata = [NSData dataWithContentsOfFile:path]; NSData *data = [NSData dataWithContentsOfFile:WritableDBPath]; //OZZipFile *readFile = [[OZZipFile alloc] initWithFileName:path mode:OZZipFileModeCreate]; OZZipFile *zipFile32= [[OZZipFile alloc] initWithFileName:path mode:OZZipFileModeCreate]; OZZipWriteStream *stream= [zipFile32 writeFileInZipWithName:@"Logfile.txt" compressionLevel:OZZipCompressionLevelBest]; [stream writeData:data]; [stream finishedWriting]; NSString *emailTitle = [NSString stringWithFormat:@"Log file of %@",[NSDate date]]; NSMutableString *messageBody = [NSMutableString stringWithFormat:@"Login with %@",user[@"Username"]]; if(![user[@"PropertyName"] isKindOfClass:[NSNull class]])[messageBody appendFormat:@"\n%@",user[@"PropertyName"]]; [messageBody appendFormat:@"\nApp version : %@",APP_VERSION]; [messageBody appendFormat:@"\nPlease describe your problem scenario here."]; [messageBody appendFormat:@"\n\n\nThanks"]; NSArray *toRecipents = [NSArray arrayWithObject:@"support@aglive.com"]; MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init]; mc.mailComposeDelegate = self; [mc setSubject:emailTitle]; [mc setMessageBody:messageBody isHTML:NO]; [mc setToRecipients:toRecipents]; [mc addAttachmentData:zipdata mimeType:@"application/zip" fileName:@"test.zip"]; [self presentViewController:mc animated:YES completion:nil]; [zipFile32 close]; } else{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Aglive Pro" message:@"You have not configured your mail account. Please configure your mail account from the device settings." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; } }right now I'm able to send a zip file in email but when I do unzip and open the file in my mobile or mac I get alert saying that The document “Logfile 4.txt” could not be opened. The file isn’t in the correct format. I don't know where I'm going wrong.