Setting `fileLengthLimit` of `AVAssetExportSession` causes: " Export failed: Cannot Open"

I am trying to limit the size of AVAssetExportSession to 10mb. Without setting fileLengthLimit, the "Export is completed". After setting fileLengthLimit = 10*1024*1024, the "Export failed: Cannot Open".

 - (void) splitVideo{
     AVURLAsset *videoAsset = [AVURLAsset URLAssetWithURL:output options:nil];
     CMTime videoDuration = videoAsset.duration;

     CMTime start = CMTimeMakeWithSeconds(0, 1);
     CMTimeRange range = CMTimeRangeMake(start, videoDuration);

     NSString *outputPath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"output1.mp4"];
     [self cutVideo:output withRange:range withOutput:outputPath];
}

 - (void) cutVideo:(NSURL *)url  withRange:(CMTimeRange)range withOutput:(NSString*)path{

    AVAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil];
    NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:asset];
    if ([compatiblePresets containsObject:AVAssetExportPresetHighestQuality]) {
         AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]
                                           initWithAsset:asset presetName:AVAssetExportPresetPassthrough];

         NSURL *finalUrl = [NSURL fileURLWithPath:path];
         exportSession.outputURL = finalUrl;
         exportSession.outputFileType = AVFileTypeMPEG4;
         exportSession.fileLengthLimit = 10*1024*1024;
         exportSession.timeRange = range;

         [exportSession exportAsynchronouslyWithCompletionHandler:^{
             dispatch_async(dispatch_get_main_queue(), ^{

             });
             if ([exportSession status] == AVAssetExportSessionStatusCompleted){
                 NSLog(@"Export completed");
             }else if ([exportSession status] == AVAssetExportSessionStatusFailed){
                 NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
             }else if ([exportSession status] == AVAssetExportSessionStatusCancelled){
                 NSLog(@"Export canceled");
             }
          }];
     }
 }

The videos being exported are around 25mb.

I replaced

AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetPassthrough]

with:

 AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];

AVAssetExportPresetPassthrough - "This export option will cause the media of all tracks to be passed through to the output exactly as stored in the source asset"