# UnknownError when Training **URL:** \ **Category:** Convolutional Neural Networks in TensorFlow\ **Tags:** week-module-1\ **Created:** [June 21, 2022, 10:36pm UTC](https://community.deeplearning.ai/t/unknownerror-when-training/144513 "2022-06-21T22:36:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Alex\_Zhen](https://avatars.discourse-cdn.com/v4/letter/a/f475e1/32.png) [@Alex\_Zhen](https://community.deeplearning.ai/u/Alex_Zhen)\ **Post date:** [June 21, 2022, 10:36pm UTC](https://community.deeplearning.ai/t/unknownerror-when-training/144513/1 "2022-06-21T22:36:41Z")
This is the error I am getting when trying to train my model. I am not sure how to interpret this. UnknownError: Graph execution error: 2 root error(s) found. (0) UNKNOWN: UnidentifiedImageError: cannot identify image file \<\_io.BytesIO object at 0x7f487ae83e90\> Traceback (most recent call last): File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/ops/script\_ops.py”, line 271, in **call** ret = func(\*args) File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/autograph/impl/api.py”, line 642, in wrapper return func(\*args, \*\*kwargs) File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/data/ops/dataset\_ops.py”, line 1004, in generator\_py\_func values = next(generator\_state.get\_iterator(iterator\_id)) File “/usr/local/lib/python3.7/dist-packages/keras/engine/data\_adapter.py”, line 830, in wrapped\_generator for data in generator\_fn(): File “/usr/local/lib/python3.7/dist-packages/keras/engine/data\_adapter.py”, line 956, in generator\_fn yield x[i] File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/iterator.py”, line 65, in **getitem** return self.\_get\_batches\_of\_transformed\_samples(index\_array) File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/iterator.py”, line 230, in \_get\_batches\_of\_transformed\_samples interpolation=self.interpolation) File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/utils.py”, line 114, in load\_img img = pil\_image.open(io.BytesIO(f.read())) File “/usr/local/lib/python3.7/dist-packages/PIL/Image.py”, line 2896, in open "cannot identify image file r" (filename if filename else fp) PIL.UnidentifiedImageError: cannot identify image file \<\_io.BytesIO object at 0x7f487ae83e90\> ``` [[{{node PyFunc}}]] [[IteratorGetNext]] [[IteratorGetNext/_4]] ``` (1) UNKNOWN: UnidentifiedImageError: cannot identify image file \<\_io.BytesIO object at 0x7f487ae83e90\> Traceback (most recent call last): File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/ops/script\_ops.py”, line 271, in **call** ret = func(\*args) File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/autograph/impl/api.py”, line 642, in wrapper return func(\*args, \*\*kwargs) File “/usr/local/lib/python3.7/dist-packages/tensorflow/python/data/ops/dataset\_ops.py”, line 1004, in generator\_py\_func values = next(generator\_state.get\_iterator(iterator\_id)) File “/usr/local/lib/python3.7/dist-packages/keras/engine/data\_adapter.py”, line 830, in wrapped\_generator for data in generator\_fn(): File “/usr/local/lib/python3.7/dist-packages/keras/engine/data\_adapter.py”, line 956, in generator\_fn yield x[i] File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/iterator.py”, line 65, in **getitem** return self.\_get\_batches\_of\_transformed\_samples(index\_array) File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/iterator.py”, line 230, in \_get\_batches\_of\_transformed\_samples interpolation=self.interpolation) File “/usr/local/lib/python3.7/dist-packages/keras\_preprocessing/image/utils.py”, line 114, in load\_img img = pil\_image.open(io.BytesIO(f.read())) File “/usr/local/lib/python3.7/dist-packages/PIL/Image.py”, line 2896, in open "cannot identify image file r" (filename if filename else fp) PIL.UnidentifiedImageError: cannot identify image file \<\_io.BytesIO object at 0x7f487ae83e90\> ``` [[{{node PyFunc}}]] [[IteratorGetNext]] ``` 0 successful operations. 0 derived errors ignored. [Op:\_\_inference\_train\_function\_17012] ---
**Author:** ![balaji.ambresh](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/balaji.ambresh/32/128697_2.png) [@balaji.ambresh](https://community.deeplearning.ai/u/balaji.ambresh)\ **Post date:** [June 22, 2022, 5:26am UTC](https://community.deeplearning.ai/t/unknownerror-when-training/144513/2 "2022-06-22T05:26:06Z")
The training data and validation data should not contain any files that are 0 in size. These 2 files should be filtered out when creating training / validation data: ```auto 666.jpg is zero length, so ignoring. 11702.jpg is zero length, so ignoring. ``` ---
**Author:** ![Alex\_Zhen](https://avatars.discourse-cdn.com/v4/letter/a/f475e1/32.png) [@Alex\_Zhen](https://community.deeplearning.ai/u/Alex_Zhen)\ **Post date:** [June 29, 2022, 1:00am UTC](https://community.deeplearning.ai/t/unknownerror-when-training/144513/3 "2022-06-29T01:00:06Z")
Thank you. Missed that instruction