title: Yolo V5 issue "Exception: Dataset not found." on local machine
body: <p>I am trying to train a model using Yolo V5.</p>
  <p>I have the issue of Data base not found.</p>
  <p>I have a train, test and valid files that contain all the image and labels files.</p>
  <p>I have tested the files on googlecolap and it dose work. However, on my local machine it shows the issue of <code>Exception: Dataset not found.</code></p>
  <pre><code>  (Yolo_5) D:\\YOLO_V_5\Yolo_V5\yolov5&gt;python train.py --img 416 --batch 8 --epochs 100 --data /data.yaml --cfg models/yolov5s.yaml --weights '' --name yolov5s_results  --cache
  Using torch 1.7.0 CUDA:0 (GeForce GTX 1080, 8192MB)
  
  Namespace(adam=False, batch_size=8, bucket='', cache_images=True, cfg='models/yolov5s.yaml', data='.\\data.yaml', device='', epochs=100, evolve=False, exist_ok=False, global_rank=-1, hyp='data/hyp.scratch.yaml', image_weights=False, img_size=[416, 416], local_rank=-1, log_imgs=16, multi_scale=False, name='yolov5s_results', noautoanchor=False, nosave=False, notest=False, project='runs/train', rect=False, resume=False, save_dir='runs\\train\\yolov5s_results55', single_cls=False, sync_bn=False, total_batch_size=8, weights=&quot;''&quot;, workers=16, world_size=1)
  Start Tensorboard with &quot;tensorboard --logdir runs/train&quot;, view at http://localhost:6006/
  Hyperparameters {'lr0': 0.01, 'lrf': 0.2, 'momentum': 0.937, 'weight_decay': 0.0005, 'warmup_epochs': 3.0, 'warmup_momentum': 0.8, 'warmup_bias_lr': 0.1, 'box': 0.05, 'cls': 0.5, 'cls_pw': 1.0, 'obj': 1.0, 'obj_pw': 1.0, 'iou_t': 0.2, 'anchor_t': 4.0, 'anchors': 3, 'fl_gamma': 0.0, 'hsv_h': 0.015, 'hsv_s': 0.7, 'hsv_v': 0.4, 'degrees': 0.0, 'translate': 0.1, 'scale': 0.5, 'shear': 0.0, 'perspective': 0.0, 'flipud': 0.0, 'fliplr': 0.5, 'mosaic': 1.0, 'mixup': 0.0}
  
  WARNING: Dataset not found, nonexistent paths: ['D:\\me1eye\\Yolo_V5\\valid\\images']
  Traceback (most recent call last):
    File &quot;train.py&quot;, line 501, in &lt;module&gt;
      train(hyp, opt, device, tb_writer, wandb)
    File &quot;train.py&quot;, line 78, in train
      check_dataset(data_dict)  # check
    File &quot;D:\me1eye\YOLO_V_5\Yolo_V5\yolov5\utils\general.py&quot;, line 92, in check_dataset
      raise Exception('Dataset not found.')
  Exception: Dataset not found.
  Internal process exited
  
  (Olive_Yolo_5) D:\me1eye\YOLO_V_5\Yolo_V5\yolov5&gt;
  </code></pre>