SystemError: <built-in function imread> returned NULL without setting an error

[SlowMonk]

def func(images):
    images = np.array(images)
    newSize = [300,300]
    print('image_A->',images[0])
    #print('boxes->',boxes)


    image = cv2.imread(images[0])
    print(image)

    scale_x = newSize[0] / image.shape[1]
    scale_y = newSize[1] / image.shape[0]
    image = cv2.resize(image, (newSize[0], newSize[1]))
    return image

def train():
    print(tf.__version__)

    images,boxes,labels,difficulties= PascalVOCDataset()
    boxes = tf.ragged.constant(boxes)
    dataset = tf.data.Dataset.from_tensor_slices((images,boxes)).shuffle(100).batch(1)
    dataset = dataset.map(lambda image,box: tf.py_function(func=func, inp = [image],Tout=tf.string))



    #print(dataset)
    #dataset = dataset.map(func)

    for image,box in dataset:
        break


def main():
    train()
if __name__ =='__main__':
    main()

image_A-> b'/media/jake/mark-4tb3/input/datasets/pascal/VOCtrainval_11-May-2012/VOCdevkit/VOC2012/JPEGImages/2008_000259.jpg'
2020-05-28 22:28:27.374154: W tensorflow/core/framework/op_kernel.cc:1610] Unknown: SystemError: returned NULL without setting an error
Traceback (most recent call last):

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 219, in call
return func(device, token, args)

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 113, in call
ret = self._func(*args)

File "/home/jake/Gits/ssd_tensorflow/train.py", line 21, in func
image = cv2.imread(images[0])

SystemError: returned NULL without setting an error

2020-05-28 22:28:27.374302: W tensorflow/core/framework/op_kernel.cc:1622] OP_REQUIRES failed at iterator_ops.cc:929 : Unknown: {{function_node _inference_Dataset_map_24}} SystemError: returned NULL without setting an error
Traceback (most recent call last):

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 219, in call
return func(device, token, args)

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 113, in call
ret = self._func(*args)

File "/home/jake/Gits/ssd_tensorflow/train.py", line 21, in func
image = cv2.imread(images[0])

SystemError: returned NULL without setting an error

 [[{{node EagerPyFunc}}]]

Traceback (most recent call last):
File "/home/jake/Gits/ssd_tensorflow/train.py", line 49, in
main()
File "/home/jake/Gits/ssd_tensorflow/train.py", line 47, in main
train()
File "/home/jake/Gits/ssd_tensorflow/train.py", line 42, in train
for image,box in dataset:
File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/data/ops/iterator_ops.py", line 622, in next
return self.next()
File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/data/ops/iterator_ops.py", line 666, in next
return self._next_internal()
File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/data/ops/iterator_ops.py", line 651, in _next_internal
output_shapes=self._flat_output_shapes)
File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/gen_dataset_ops.py", line 2673, in iterator_get_next_sync
_six.raise_from(_core._status_to_exception(e.code, message), None)
File "", line 3, in raise_from
tensorflow.python.framework.errors_impl.UnknownError: {{function_node _inference_Dataset_map_24}} SystemError: returned NULL without setting an error
Traceback (most recent call last):

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 219, in call
return func(device, token, args)

File "/home/jake/venv/lib/python3.7/site-packages/tensorflow_core/python/ops/script_ops.py", line 113, in call
ret = self._func(*args)

File "/home/jake/Gits/ssd_tensorflow/train.py", line 21, in func
image = cv2.imread(images[0])

SystemError: returned NULL without setting an error

 [[{{node EagerPyFunc}}]] [Op:IteratorGetNextSync]

Process finished with exit code 1